Wimbledon claimed another casualty on Saturday when Dutchman Igor Sijsling retired from his third round match with Croatia's Ivan Dodig.
It was the 13th singles retirement/walkover of the injury-plagued tournament.
Equalling an open era Wimbledon record for drop-outs, which was set in 2008, Sijsling was 6-0 6-1 1-0 down when he called a halt for a reason yet to be specified.
The grasscourt Grand Slam had already seen several high-profile pull-outs in the first week.
The drop-outs in the first two rounds included Australian Open champion Victoria Azarenka and men's sixth seed Jo-Wilfried Tsonga.
Many players blamed the slick turf for the medical mayhem.
Dodig has now won two of his three matches in this tournament by retirement, having also profited in his first round clash with Germany's Philip Kohlschreiber.
The world number 49 next meets Spain's fourth seed David Ferrer or Ukrainian Alexandr Dolgopolov in the last 16.
The last time a Grand Slam witnessed so much medical mayhem was at the 2011 US Open when nine quit the first round.
The previous Wimbledon record was eight in the first round in 2008.
The unlucky 13 injured players