Peng, a 35-year-old Wimbledon and French Open doubles champion, has alleged that former Chinese vice-premier Zhang Gaoli, now in his 70s, forced her into sex during a years-long on-and-off relationship.
The second-ranked Medvedev brushed aside Jan-Lennard Struff aside 6-4, 6-4 to seal the Russian victory after Rublev took the lead with a 6-4, 6-0 win over Dominik Koepfer.
Davis Cup: Daniil Medvedev leads the way as Russia defeat Sweden to enter second successive semi-final
Russia will on Saturday face Germany for a place in Sunday's final with Novak Djokovic's Serbia meeting neighbours Croatia in the other semi-final on Friday.
Djokovic eased past Alexander Bublik 6-3, 6-4 to level the quarter-final at 1-1 before teaming with Nikola Cacic to see off Andrey Golubev and Aleksandr Nedovyesov 6-2, 2-6, 6-3 in the decisive doubles.
Britain’s Joe Salisbury and Neal Skupski looked destined to force a third set, but Kevin Krawietz and Tim Puetz won the final seven points to help Germany book a clash with Russia or Sweden in Madrid on Saturday
AITA also released its complete correspondence with the International Tennis Federation (ITF) concerning the qualification of India's men doubles team for the Tokyo Olympics.
Tokyo Olympics 2020: AITA hits back at Rohan Bopanna, questions why doubles star didn’t qualify on his own
The AITA had announced the nomination of Bopanna and Sharan for the men's doubles event of the Tokyo Games. However, Bopanna (38) and Sharan (75), with a low combined rank of 113 missed out on qualification.
Tokyo Olympics 2020: Rohan Bopanna hits back after AITA condemns 'misleading' tweets over qualification
In a response to Bopanna's tweet, Sania echoed similar sentiments, saying that the lack of clarity may well have cost India a shot at winning the medal in the mixed doubles event.
Tokyo Olympics 2020: AITA asks ITF to consider Ankita Raina's Asian Games bronze for place in women's singles draw
Ankita had won a bronze at the 2018 Asian Games, where the winner was assured of a continental qualification place in the women's singles draw at the Tokyo Olympics.
Madrid will host two groups, two last-eight ties, the semi-finals and the final.
The tour's highest Premier Mandatory and Premier 5 tournament categories will from 2021 be renamed WTA 1000, mirroring the ATP 1000 tournaments which are one step down from the Grand Slams.
Fed Cup renamed to Billie Jean King Cup in honour of former tennis great, pioneer for women's tennis
King's association with the Fed Cup goes back to its founding, when she was a member of the US team that won the inaugural tournament in 1963 at Queen's Club in London.
Novak Djokovic says he has no hard feeling for Roger Federer, Rafael Nadal for not joining new players' union
Nadal and Federer called for "unity, not separation" after Djokovic revealed at the weekend that he was spearheading a controversial breakaway union for professional male players.
The ITF said the 18 nations that already qualified for the Davis Cup 2020 finals will keep those spots in 2021.
Now that there is a plan in place for top-level tennis to resume - starting in August in Italy, then Washington, with Grand Slam action to follow in New York, then Paris, assuming the COVID-19 outbreak allows - it's time to consider ways in which the sport will look different.
An FFT statement said it had consulted with the ATP, WTA and International Tennis Federation (ITF) to allow the French Open showpiece the benefit of an extra week.
The men’s Tour will resume on 14 August with the Citi Open, ATP 500 event in Washington, DC, while the first WTA event will be staged in Palermo, Italy from 3 August.
Financial aid has slowly trickled in for tennis players in the lower echelons of the sport during the COVID-19 shutdown but the vast majority of men and women who coach them for a living have been left to fend for themselves.
Coronavirus Outbreak: International Tennis Federation to release funds to lower-ranked players through national federations
Only those tennis players who have been regular in the competition in the last 10 months, will be extended help.
French Open working towards avoiding clash of dates with US Open, says Roland Garros director Guy Forget
French Open director Guy Forget said he was working hand in hand with tennis authorities to make sure the dates of the claycourt Grand Slam tournament and those of the US Open do not clash, adding that Flushing Meadows would make an announcement next month.