Britain's Andy Murray will face a different challenge when he takes on big-serving American Sam Querrey in the Wimbledon quarter-finals on Wednesday.
The world number one and defending champion, 30, plays 24th seed Querrey on Centre Court at 13:00 BST.
Murray expects his return to be tested against the serving prowess of Querrey, 29, having beaten four unorthodox opponents on his way to the last eight.
Roger Federer, 35, plays Milos Raonic in the second match on Centre Court.
The Swiss seven-time champion, seeded third, lost to Canadian sixth seed Raonic in last year's semi-final but has looked in imperious form so far this year.