Andy Murray has pulled out of his Citi Open quarter-final with Alex de Minaur in Washington.
The former world number one cited exhaustion for his decision following a gruelling week which had seen him taken to three sets in all three of his matches and spend more than eight hours on court.
The 31-year-old, who only finished his third-round win against Marius Copil at 3am on Friday morning, said in a statement on the ATP website: “I won’t be able to play my match tonight. I’m exhausted after playing so much over the past four days, having not competed on the hard courts for 18 months.
“I also need to be careful and to listen to my body as I come back from a long-term injury.
“I’m gutted not to be playing and I’d like to thank the tournament and all the fans.”
It was Murray’s first hard court tournament since March 2017 having been plagued by a hip injury.
He added: “There are lots of positives to take from this week, so I’ll take some time to rest and recover – I won’t play in Toronto next week – and then head to Cincinnati early to prepare and get ready.”
Murray had earlier announced he would not be playing in next week’s Rogers Cup in Toronto.
A tweet on the Citi Open Twitter feed read: “It’s been an honor to be a part of your comeback journey, @andy_Murray! Wishing you a speedy recovery. Whatever it takes, we know you’ll rise stronger than ever.”
The week in Washington saw Murray play the most consecutive matches since returning from the hip problem which kept him out for 11 months and he will now have a week’s rest and recovery instead of heading to Canada.
He was handed a wild card to the tournament he has won three times, but will now travel to Cincinnati to prepare for his next scheduled event – the Western and Southern Open starting on August 13.
Murray earlier said in a statement on Facebook: “Sadly I won’t be able to take my place in the draw in Toronto. I’d like to thank the tournament for a wild card, I always love playing in Canada and look forward to returning next year.
“I’ve played quite a few matches this week in Washington and I need to be smart with my rest and recovery as I come back from injury.
“My plan is to head to Cincinnati early next week. Appreciate all the support this week in Washington, it’s amazing to be back playing.”
Murray was left sobbing after his marathon win over Copil, which came after previous lengthy battles against Mackenzie McDonald and British number one Kyle Edmund.
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.