You know you've done something well when you impress Roger Federer.
Federer, a 20-time major winner during his decorated career, was beyond impressed with what he saw during the marathon French Open men's singles final between Carlos Alcaraz and Jannik Sinner, a thrilling come-from-behind victory for Alcaraz in five hard-fought sets, the second-longest grand slam singles final in the history of men's tennis.
