Raonic, who afterwards played down any lingering effects of the hip injury that bothered him against Andrej Martin in the third round, dropped serve
again at 4-4 in the second set and Ramos-Vinolas duly held to take a two-set lead.
The 23-year-old dropped serve
in game seven to lose the first set 6-4, and was up against it at 15-30 in the fifth game of the second.
The signs were ominous when the British number three dropped serve
in the opening game.
Szavay is favourite to make the last eight, but the 13-8 about wild-card Martic is worth taking after she dropped serve
only once during her 6-4 3-6 7-5 triumph over third seed Wickmayer.
Del Potro took the first set on a tiebreak, after neither player dropped serve
Del Potro took the first set on a tie-break, after neither player dropped serve
The 21-year-old Mallorcan looked helpless at times and showed signs of nerves, notably when he dropped serve
with a double fault in the third game of the last set.
Chladkova dropped serve
to go 4-2 down in the decisive set and Sidot then served for the match, leading 5-3.
When van Roost dropped serve
again to start the second set, she called for a trainer, who took her off the court to re-wrap her heavily bandaged abdomen.
Ferrer, a quarter-finalist in 2012 and 2013, broke back after slipping behind in the second set but dropped serve
at 4-4 allowing Mahut to hold serve for a two-set lead.
An unexpected lapse threatened to become something more serious when Murray dropped serve
again, clutching his shoulder, and Seppi then broke at the start of the third set as his opponent screamed "Useless
But the Scot was also struggling to find his rhythm and promptly dropped serve