Nadal says its's an emotional return for him giving how he exited with an injury at the same stage last year. Nadal says that the NextGen needs to wait for their chance but admits that it looks like they don't want to as the crowd laughs along with the Spaniard. On his semi-final opponent Tsitsipas, Nadal says that he's a player who has been improving every month last year. He is able to win against the best players of the world already. He is a great player and will be one of the best players in years to come. Nadal also says that he worked on his serve and forehand during the offseason to win points quicker and prolong his career. On Carlos Moya's impact, Nadal says that with Moya, he's practising different and says it is good to view things from a different perspective.
Rafael Nadal storms into the semi-final
Frances Tiafoe walks off RLA to a standing ovation from the crowd. The American endeared himself to the Melbourne Park crowd with his brilliant wins and passionate celebrations.
Tiafoe vs Nadal 3-6, 4-6, 2-6. Rafael Nadal storms into semi-final!
Nadal starts with two fierce aces out wide. He loses a point but gets two match points with a classic serve and putaway before clinching the match off a Tiafoe error. Game, set and match, Nadal! Brutal display of tennis from the 2009 champion. He exchanges a hug with Tiafoe at the net and gives him a few words of encouragement. Next up for Nadal is the Greek sensation, Stefanos Tsitsipas.
Tiafoe vs Nadal 3-6, 4-6, 2-5*
Two Tiafoe forehand errors gives Nadal a 30-0 lead. Tiafoe makes his way to the net and goes well to close down the angle on Nadal's forehand side which leads to Rafa hitting his return wide. But Nadal cranks up the pressure and gets the break to get within a game of making it to the semi-finals.
Tiafoe vs Nadal 3-6, 4-6, *2-4
Another easy hold sealed with an ace. Rafa is coasting towards the semi-final.
Tiafoe vs Nadal 3-6, 4-6, 2-3*
Despite staring at a disheartening defeat, Tiafoe is not downcast and he's still bringing out his best shots. He allows Nadal back with two errors but gets the hold with two good serves.
Tiafoe vs Nadal 3-6, 4-6, *1-3
An easy hold to 15 from Rafa. This has been a brilliant exhibition of tennis from the World No 2.
Tiafoe vs Nadal 3-6, 4-6, 1-2*
Tiafoe hits a forehand winner and follows it up with a hattrick of aces to get a love-hold.
Tiafoe vs Nadal 3-6, 4-6, *0-2
Nadal races to a 40-0 lead with the last point coming off an ace. Tiafoe is offered a lifeline as Nadal loses two points but quickly shuts the door to hold.
Tiafoe vs Nadal 3-6, 4-6, 0-1*
Oh dear! The third set also begins badly for Tiafoe. The American is broken once again in the opening game and his job just got a little bit more difficult. Ruthless from Rafa nonetheless.
Tiafoe vs Nadal 3-6, 4-6, *0-0
Take a look at the stats from the second set.
Tiafoe vs Nadal 3-6, 4-6. Rafa Nadal claims second set
And Nadal goes two-sets up in the quarter-final. A better set with longer rallies and good shots from both players. Rafa, though, was just too much for Tiafoe and now the American has a mountain to climb.
Tiafoe vs Nadal 3-6, 4-5*
Nadal races to a 40-15 lead as Tiafoe stares at losing the second set on his serve. He saves on set point with a forehand winner right at Nadal's forehand corner and gets to deuce with a fiery ace. Nadal gets another set point after Tiafoe's forehand lands on the wrong side of the line. Tiafoe saves it and then goes on to hold with an ace. Nadal will serve to take a 2-0 lead in the match.
Tiafoe vs Nadal 3-6, *3-5
Tiafoe has a sniff at getting a break back as he wins two points off Nadal's serve. However, Nadal closes out the game with an ace and a service winner. Nadal has offered very little on his service game for Tiafoe to attack.
Tiafoe vs Nadal 3-6, 3-4*
Good hold from Tiafoe. Hits back-to-back aces to win the game.
Tiafoe vs Nadal 3-6, *2-4
Uncharacteristic miss from Nadal as he looks to play a delicate drop shot. At 15-15, Nadal lets rip a trademark running forehand winner down the line. Rafa gets the hold. Apart from the fourth game, Nadal has rarely been troubled on his serve.
Tiafoe vs Nadal 3-6, 2-3*
An ace and a wide return from Nadal gives Tiafoe a 30-0 lead. He hits a clean backhand winner before getting a hold to love.
Tiafoe vs Nadal 3-6, *1-3
Tiafoe gets his first breakpoint of the match and he squanders it by sending his backhand long. He's clearly frustrated by the missed opportunity but he gets another opportunity on the following point. His backhand is called out and Tiafoe challenges unsuccessfully. Nadal gets two chances to get his hold but his backhand fails him. Nadal finally holds at the third time of asking.
At 15-15, Tiafoe serves out wide to Nadal's forehand but Nadal somehow manages to sneak in a winner. Tiafoe finally gets the hold after a couple of backhand errors from the Spaniard.
Tiafoe vs Nadal 3-6, *0-2
Nadal had an 86% chance of winning according to the official win predictor. That has jumped to a whopping 98% after he won the first set. A forehand winner is sandwiched between two fiery aces and he holds to love.
Tiafoe vs Nadal 3-6, 0-1*
Three unforced errors from Tiafoe hands Nadal a triple breakpoint. Nadal doesn't need a second invitation as he unleashes his signature forehand passing shot to get the early break. Not the ideal start for Tiafoe after losing the first set.
Tiafoe vs Nadal 3-6, *0-0
Take a look at the stats from the first set.
Tiafoe vs Nadal 3-6. Rafael Nadal wins the first set.
Nadal rushes to the net and whips in a vicious forehand which Tiafoe can only scoop long off his ankles. At 15-15, Tiafoe once again fails to land his volley inside. Nadal smacks a forehand winner next and seals the set with a forehand winner to end what was possibly the longest rally so far.
Tiafoe vs Nadal 3-5*
Tiafoe fires in a 201km/hr ace at 0-15. Rafa sends his backhand wide on the next point. Tiafoe has the upper hand on the next point as he charges to the net but can't keep his backhand volley in. Rafa gets two points off Tiafoe's serve but the American gets the hold. Nadal will now serve for the set.
Tiafoe vs Nadal *2-5
Nadal hits a forehand wide at 40-0. Otherwise, it has been a solid service game from the Spaniard as he moves within a game of clinching the first set.
Tiafoe vs Nadal 2-4*
Tiafoe gets the hold to love once again.
Tiafoe vs Nadal *1-4
Nadal nets his backhand on the first point. Tiafoe is able to get a hang of Nadal's shots but loses the point with a long backhand. Nadal sees Tiafoe charging to the net and hits a vicious forehand passing winner. He follows it up with an ace before sealing the hold with a sliced backhand winner at the net.
Tiafoe vs Nadal 1-3*
Tiafoe finally gets on the scoreboard with a love-hold of his own.
Tiafoe vs Nadal *0-3
Sensational from Nadal as he races through his serve to get a hold to love. Tiafoe has been taken aback by Nadal's quick start and needs to gather his thoughts at the changeover if he has to have any chance of coming back in this set.
Tiafoe vs Nadal 0-2*
Nadal breaks! The Spaniard matches Tiafoe point for point until deuce before forcing errors off Tiafoe to get the break.
Tiafoe vs Nadal *0-1
Promising start from Tiafoe as he attacks the nets straightaway but he nets his return. Nadal hits an ace and follows it up with a service winner. The Spaniard closes out the game with another ace. Quick hold to love from Rafa.
Tiafoe vs Nadal 0-0*
Frances Tiafoe vs Rafael Nadal
Nadal wins the toss and will serve first. This is the first time that the duo are playing each other. However, five years ago, a 16-year-old Tiafoe got the opportunity to practice with the then World No 1 Nadal.
Tiafoe has won hearts at Melbourne Park with his emotional celebrations after winning against Kevin Anderson and Grigor Dimitrov. And frankly, it is emotional to watch too.
Talented Frances Tiafoe takes measured approach to enter first-ever Grand Slam quarter-finals
Tiafoe's life story is one of tennis' endearing underdog tales that has been repeated often ever since he started coming up through the junior ranks. The son of immigrants who fled the civil war in Sierra Leone, much of Tiafoe's childhood was marred with financial struggle. But his tennis talent has been the ticket out of those testing times. Read Deepti Patwardhan's feature of Frances Tiafoe's journey to the top of tennis.
Frances Tiafoe vs Rafael Nadal
Up next? Frances Tiafoe vs Rafael Nadal.
Petra Kvitova gets emotional after making it to the semi-finals
.@Petra_Kvitova is into her first Slam semifinal since a knife stabbing incident in late 2016 sidelined her from the sport.
The first thing that Kvitova does is apologise to the crowd for ending Barty's run. She praises the 22-year-old for her run eliciting applause from the crowd. On reaching her first Major semi-final since surviving a knife attack, Kvitova breaks down and says that she's just thankful to be able to be back in Melbourne. On facing Collins, Kvitova says that despite her relative inexperience on the Grand Slam stage, Collins is a dangerous player and Kvitova won't be taking her lightly.
Kvitova vs Barty 6-1, 6-4. Petra Kvitova storms into the semi-final!
Petra Kvitova is through to her second Australian Open sem-final! She beats home hope 6-1, 6-4 to set up a semi-final clash against the giant-killing Danielle Collins! A nice moment at the net as Kvitova hugs Barty who gave hope to an entire nation during her quarter-final run.
Kvitova vs Barty 6-1, *5-4
Kvitova senses that this is the right time to get a break as she goes after Barty's forehand. The plan works well as she gets the all-important break and gives her the chance to serve for the match.
Kvitova vs Barty 6-1, 4-4*
Barty has raised her game in the second set unlike in the first where Kvitova was able to hit her out of the park. She is forcing errors out of Kvitova's favoured backhand as she did in this game. The eighth seed gets a warning for time violation but she still gets the hold to 30.
Kvitova vs Barty 6-1, *3-4
Barty starts with a service winner but follows it up with her first double fault of the match. A brilliant point follows where Kvitova is forced from one corner of the court to the opposite corner at the net giving Barty an easy put-away. Kvitova wins a point at the net before Barty closes out the game with an ace down the T.
Preview: Relentless Rafael Nadal will aim to snuff out the challenge of young giant-killer Frances Tiafoe Tuesday, while young Greek Stefanos Tsitsipas has eyes on a maiden Australian open semi-final after knocking out Roger Federer.
The Australian Open hits the quarter-final stage in Melbourne with 17-time Grand Slam winner Nadal emerging as a strong title favourite.
The Spaniard has not dropped a set and demolished former world number four Tomas Berdych 6-0, 6-1, 7-6 (7/4) in the fourth round in an awesome display.
Lying in his path is American Tiafoe who has already accounted for the fifth seed Kevin Anderson and become a fans' favourite with his exuberant LeBron James style celebrations and inspiring life story.
The son of immigrants from Sierra Leone, Tiafoe turned 21 on Sunday and celebrated his birthday by beating 20th seed Grigor Dimitrov to reach a Slam quarter-final for the first time.
"I wasn't a normal tennis story," he told reporters, revealing he had already managed to buy his mother a house in Maryland and help his janitor dad.
"The beginning of my career I was trying to do everything for my family. Obviously now I put them in a great place. Now I'm trying to do it for me.
"I'm so excited to play Rafa. We're going to have some fun, going to have some long rallies."
Nadal said he was aware of the young world number 39, and would be on his guard against a man he had never played.
"He has everything. He's quick. He serve well. Very quick forehand," said the 2009 champion who is aiming to become the only man in the Open era to win all four Grand Slams at least twice.
'He's dangerous': Nadal
"He's a very dynamic player, aggressive one. Of course, he's dangerous. He's in quarter-finals."
Tsitsipas was thrust into the global spotlight after ending double defending champion Federer's quest for a record seventh Australian Open.
The gifted 20-year-old has already secured his place in history as the first Greek to reach a Grand Slam quarter-final.
He held off 12 break points before flummoxing the Swiss master in four sets.
"This win is a good milestone, let's say good first step to something bigger," said the exciting 2018 NextGen Champion.
"I'm really pumped and excited to be competing in the quarter-finals. I'm really waiting for that moment."
He faces another Spaniard, the in-form Roberto Bautista Agut.
The 22nd seed beat Novak Djokovic on his way to the title in Doha earlier this month before ending Andy Murray's hopes, and possibly his career, in the first round in Melbourne.
Bautista Agut is looking to extend his 2019 win streak to 10 matches and a potential all-Spanish semi-final against Nadal.
"Tsitsipas is doing very well," said Bautista Agut. "He's one of the top players in the world. He will be one of the best, for sure. He's playing at a very high level."