The problem with the author's tennis anecdote about Roger Federer's 2017 career resurgence is that in reality it had more to do with the top player Novak Djokov

The problem with the author's tennis anecdote about Roger Federer's 2017 career resurgence is that in reality it had more to do with the top player Novak Djokovic's elbow injury than with Federer's backhand. "In 2017, Djokovic suffered from an elbow injury that weakened his results until the 2018 Wimbledon Championships, where he won the title while ranked No. 21 in the world." https://en.wikipedia.org/wiki/Novak_Djokovic#Career_statistics https://en.wikipedia.org/wiki/Novak_Djokovic#Career_statisti...