The Czech star was stricken by cramp at the end of his second-round match played in very hot conditions.

Two-time French Open finalist Casper Ruud overcame extreme heat – and a defiant Russian qualifier Roman Safiullin – to advance to the second round at Roland Garros.

Mensik fell onto the clay and lay there for several minutes after beating Mario Navone in four hours and 41 minutes in gruelingly hot conditions