Following is an assessment of each player from coaches, analysts and former professionals. To separate themselves from their peers, each must refine his game these 10 are most likely to join the sport’s elite, if they improve one aspect of their game. Now a new crop of youngsters, 24 and under, is charging up the rankings, but some will stall. Novak Djokovic dominated men’s tennis this year, but with Roger Federer and Rafael Nadal wearing down physically, 2021 also signaled a changing of the guard: Stefanos Tsitsipas reached the French Open final Matteo Berrettini reached the Wimbledon final Alexander Zverev won the Olympic gold medal and Daniil Medvedev reached the Australian Open final and then won the United States Open.
