Marcos opened his 10th Wimbledon campaign with a win on Monday, defeating Donald Young 5-7, 6-2, 6-4, 6-4 in two hours and 11 minutes.
In rallying from a set down, Marcos fired 11 aces and 42 total winners, claiming 72 per cent of first serve points and securing five breaks of serve. Nine years removed from a memorable semifinal finish at the All England Club, Marcos advanced to the second round for the fourth time in the last five years.
Looking to capitalise on the momentum, Marcos will face qualifier John Millman next, after the Australian advanced with a straight sets upset of No. 19 seed Tommy Robredo. He will seek to level his head-to-head series against Millman after dropping their lone meeting at last year's Napa Challenger.
The match will be on Wednesday, with the winner facing either No. 16 seed David Goffin or British wild card Liam Broady.
