Britain’s former world number one Andy Murray broke down in tears after coming from a set down to beat Romanian Marius Copil and reach the last eight of the Washington Open.
The 31-year-old won 6-7 (5-7) 6-3 7-6 (7-4) in a match that finished at 03:02 local time.
Murray will play Alex de Minaur of Australia in the quarter-finals – his first since Wimbledon in 2017.
He is playing only his third tournament since hip surgery in January.
Three-time Grand Slam champion Murray – now ranked 832 in the world – lost the first set in one hour and six minutes, having taken a 5-0 lead in the tie-break before losing seven points in a row.
He broke Copil twice in the second set to take it in 45 minutes and looked set to take the third comfortably when he secured a break in the sixth game to move 4-2 up.
But the Romanian, ranked 93rd, immediately broke back before holding serve to level the match, before Murray’s fitness prevailed in the deciding tie-break.
An emotional Murray then sat courtside and sobbed into his towel.
The tournament’s previous latest finish was 02:27 local time.