Andy Murray and Jamie Murray returned to court together for the first time since 2016 with a gutsy three-set win over experienced French pair Nicolas Mahut and Edouard Roger-Vasselin.
The Scottish brothers missed three match points before sealing a 6-4 6-7 (7-9) 10-5 win at the Washington Open.
They trailed 5-2 in the decider – a first-to-10 champions tie-break – but won eight straight points for victory.
Andy Murray, 32, is playing his fourth event since hip surgery in January.
The former world number one feared his career might be over before having the hip resurfacing operation, but returned to the doubles court five months later when he won the Queen’s title alongside Spain’s Feliciano Lopez.
The three-time Grand Slam champion says he could make a singles return at the Cincinnati Masters later this month and looked in the best shape he has been since resuming his career as he won alongside his older brother Jamie.
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Murray’s demeanour on his return to the American capital was markedly different to 12 months ago when, struggling to cope with the pain in his hip, he broke down in tears at the end of his third-round singles win against Marius Copil at about 3am local time.
Now he is pain free – looking happy on court and as fiercely competitive as ever – as he continues towards his ultimate goal of returning to singles action.
“I’m in a much better place than last year – physically I feel better, I’m not restricted in hitting shots, I’m still a bit slow but hopefully that will improve,” he said.
“To come back here and be pain free is brilliant.”
The Murray brothers, who won doubles titles together in Valencia in 2010 and Tokyo in 2011, complemented each other well as they impressed with their quick reactions around the net and solid serving.
A tight first set swung the way of the Britons when a brilliant cross-court backhand from Andy Murray brought up three sets points as Jamie Murray – who won this tournament with Brazilian Bruno Soares last year – converted the first by threading a winner between the Frenchmen.
Another finely-balanced set stayed on serve – with Andy Murray particularly dominant – to take the second into a tie-break where Mahut and Roger-Vasselin dug deep to fight off three match points.
The momentum initially stayed with the Frenchmen as they moved ahead in the decider before the Murrays battled back to clinch an entertaining match to reach the last eight.
“The level of tennis was really good. Doubles matches are tough because they can turn on a few points,” said Andy Murray. “But we felt we were in control for most of the match and I think we deserved it.”
Jamie Murray added: “It was a lot of fun. To play tennis together again was really special and we’re glad to get another match.”