Andy Murray advanced to the quarter-finals of the Citi Open in Washington DC with a 6-7 (5/7) 6-3 7-6 (7/4) success against Romania’s Marius Copil.
The 31-year-old Scot is continuing his comeback from hip surgery in January and his fitness was put to the test in the US capital in a match which lasted over three hours and did not conclude until 0300 Friday local time.
Murray, who was visibly emotional after the match, will face Alex de Minaur in the last eight after the Australian beat Hyeon Chung 6-2 4-6 6-2.
Top seed Alexander Zverev is also into the last eight after a 6-3 7-5 victory over his brother Mischa.
The German will play Kei Nishikori in the quarter-finals after he emerged as a 7-6 (7/1) 6-3 winner against Denis Shapovalov.
David Goffin broke little sweat in beating Frances Tiafoe 6-0 6-3 and the Belgian will face Stefanos Tsitsipas after the Greek got the better of James Duckworth 6-3 6-4.
Denis Kudla was a surprise 7-5 6-7 (6/8) 7-6 (7/5) winner over Lucas Pouille to set up a last-eight clash against Andrey Rublev, who won 6-3 6-2 against Noah Rubin.
Juan Martin del Potro made a safe passage into the semi-finals of the Abierto Mexicano in Los Cabos.
The Argentinian beat Egor Gerasimov 6-1 6-1 and the top seed will face Damir Dzumhur in the last four after the Bosnian triumphed 6-2 6-3 against Michael Mmoh.
Second seed Fabio Fognini beat Yoshihito Nishioka 6-2 6-2 and he will play Britain’s Cameron Norrie, who won 6-4 6-4 against fourth seed Adrian Mannarino of France.
Elsewhere, Maximilian Marterer was knocked out of the quarter-finals of the Generali Open by qualifier Denis Istomin.
Marterer, the highest seed remaining in the draw, was beaten 6-3 6-3 by Uzbekistan’s Istomin in Kitzbuhel.
Martin Klizan won 4-6 7-6 (8/6) 6-2 against Dusan Lajovic, Jaume Munar was a 7-6 (7/3) 6-3 winner over Taro Daniel while Nicolas Jarry saw off Matteo Berrettini 7-5 6-3.
Venus Williams held off a fightback from Heather Watson to win through to the quarter-finals of the Mubadala Silicon Valley Classic.
The number three seed is the highest ranked player left in the competition after both Garbine Muguruza and Madison Keys were forced to withdraw due to injury before their second-round matches.
Williams, 38, had raced into an early lead against Watson in San Jose, but the British player rallied in the second set to level the match.
Watson lost her momentum in the decider, however, and the American closed out the match in rapid fashion, winning 6-4 4-6 6-0.
She will next face Greece’s Maria Sakkari, who routed number eight seed Timea Babos 6-0 6-1.
Earlier, number five seed Mihaela Buzarnescu had defeated Amanda Anisimova 7-5 2-6 6-1, while Australia’s Ajla Tomljanovic beat Magdalena Frech 6-4 3-6 6-3.
At the Citi Open in Washington, Magda Linette stunned number three seed Naomi Osaka 6-2 3-6 6-3 to head into the final eight.
The Polish player had been a break down in the final set, but won four consecutive games – and the last 13 points in a row – to close out the upset in two hours and five minutes.
Linette, the world number 62, will take on number seven seed Donna Vekic in the quarter-finals after the Croatian prevailed in an epic deciding tie-break to win 6-2 3-6 7-6 (15/13) against Fanny Stollar.
Meanwhile, Svetlana Kuznetsova beat Ana Bogdan 6-2 6-1, eighth seed Yulia Putintseva defeated Jennifer Brady 7-5 6-2 and Saisai Zheng overcame Ysaline Bonaventure 6-4 6-4.
Former world number one Andy Murray continued his comeback from hip surgery by beating fellow Briton Kyle Edmund in the second round of the Washington Open.
Three-time Grand Slam victor Murray earned a way past reigning British number one Edmund 7-6 (7-4) 1-6 6-4.
He will next play Romania’s Marius Copil in the third round.
Watch highlights of the match below.