I'm a different player at Wimbledon 2021: Federer on 4th round win

After reaching Wimbledon quarter-finals for the record-extending 18th time, eight-time champion Roger Federer said that he's a "different player" at the tournament this year than he has been in previous years. "I have to understand what works and think point by point...I vary from the baseline even more than I did before. It's a different time," he added.