Roger Federer, one of the greatest players of all time, will retire from top-level tennis after the Laver Cup in London this month.
The 20-time Grand Slam champion has not played since Wimbledon 2021, after which he had a third knee operation.
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Federer has struggled with a knee problem for the past three years that has restricted him to only three of the 11 Grand Slams staged since the start of 2020.
He has not played a competitive match since losing to Hubert Hurkacz in the quarter-finals at Wimbledon.
He subsequently announced he needed more surgery on his knee having previously had two operations in 2020.