Since the turn of the 21st Century, three men have dominted professional tennis: Roger Federer of Switzerland, Rafael Nadal of Spain and Novak Djokovic of Serbia.
Federer won the first of his 20 Grand Slam titles in 2003 when he won Wimbledon. Nadal won the first of his 20 Grand Slam titles in 2005 when he won the French Open. Djokovic won the first of his 17 Grand Slam titles in 2008 when he won the Australian Open. Since 2003, these three men have won a remarkable 57 of 71 Grand Slam tournaments, or 80%. No one but these three plus Andy Murray of Great Britain has won Wimbledon. Nadal has won 13 of the last 16 French Opens. Federer and Djokovic have each won one on the red clay at Roland-Garros in Paris.
Each has recovered from serious to win and stay near the top of the tennis world. Someday, their reign as the kings of tennis will end. In the meantime, enjoy watching them play when you can.
You are looking for a nano near the tennis courts, so you might want to have a pair of tweezers.