Monte Carlo: Andy Murray returned from over a month out with an elbow injury to launch his clay-court season with a gruelling 7-5, 7-5 defeat of Gilles Muller at the Monte Carlo Masters on Wednesday.
The world number one was joined in the third round by nine-time tournament champion Rafael Nadal, who held off British surprise-package Kyle Edmund 6-0, 5-7, 6-3 in the Spaniard's 400th career match on clay.
The Scot Murray waited until late in both sets to make his move, finally putting Muller away in just under two hours as he builds up to the French Open in May-June.
But the 29-year-old was poor on his serve with eight double faults while breaking Luxembourg's Muller four times.
"I definitely played better as the match went on, obviously first service game was not ideal," Murray said. "But when you are coming back from not really serving for a few weeks, it's I think normal.
"Maybe the technique changed a little bit. You get into the match, and it's tricky."
Murray was kept on the back foot in the opening set as he lost the first game and only caught up late.
In the second he was also far from his fluent best, before grinding out victory.
It was the first time back on the ATP since his elbow problem - his last match was a second-round loss to Vasek Pospisil at Indian Wells on 12 March.
The three-time Monte Carlo semi-finalist Murray, who has had a sticky start to 2017 with form and injury, now stands 13-3 on the season and has one title from Dubai in his pocket.
Murray said: "My elbow's always a bit sore, always. That's nothing to do with this week.
"The last two years, always when I serve, it's just a little bit sore. But it was nothing out of the ordinary today."
Victory for Nadal came in his 400th match on clay, his record on the surface an outstanding 366-34.
The Spaniard swept the first set 6-0 against 45th-ranked Edmund, but found himself fighting for survival in the third set.
The fourth seed finally squeezed home after two and a quarter hours.
Murray and Nadal were joined in round three by Swiss third seed Stan Wawrinka, who saw off Czech Jiri Vesely 6-2, 4-6, 6-2.
Three-time Grand Slam winner Wawrinka won Monte Carlo three years ago over compatriot and friend Roger Federer.
"Overall it was a good match, the first match on clay," said the Swiss. "The feeling was good. Winning in three sets means it was a good victory. It's important to win and keep going.
"I prepared well, practice was good. Physically I'm fine.
"I know my level is good. If I'm able to improve I might have a chance in this tournament."
Croatian fifth seed Marin Cilic defeated France's Jeremy Chardy 6-3, 6-0, while Austrian Dominic Thiem, seeded sixth, advanced over Dutchman Robin Haase 6-3, 6-2.
Czech ninth seed Tomas Berdych put an end to the run of 39-year-old Tommy Haas 3-6, 6-1, 6-4.
Pablo Carreno Busta, Alexander Zverev and Albert Ramos-Vinolas also advanced.
Updated Date: Apr 20, 2017 10:22 AM