Jannik Sinner of Italy returns the ball during the men's singles match as waits in the semi-finals.

Jannik Sinner is on course for a blockbuster Wimbledon showdown with Novak Djokovic after the defending champion ended German veteran Jan-Lennard Struff's fairytale run in the quarter-finals.

Sinner won 7-5, 7-6 (7/4), 6-3 on Court One and will face Djokovic in the last four if the seven-time Wimbledon champion beats Canadian Felix Auger-Aliassime later on Tuesday.

In the women's tournament, Coco Gauff and Karolina Muchova reached their first Wimbledon semi-finals.

With Wimbledon basking in sweltering temperatures this week, world number one Sinner had to answer some uncomfortable questions about his ability to withstand the heat.