An important chess lesson via tennis
(Serbia) Novak Djokovic vs (France) Lucas Pouille at the 2019 Australian Semifinal
6 6 6
0 2 2
He was a good player. But he had weaknesses (1st serve, mental toughness, nerves, etc.). He worked hard to fix his weaknesses. Now his weaknesses have become dangerous weapons.
He moves very well on the court. His fitness is impeccable. His serves are good and accurate. Both his backhand and forehand are good. He can stay on the baseline all day long. He can also serve and volley with excellent efficiency. His lobs and drop shots are also lethal. He has virtually no weakness.
In the next 3-4 years, he has a chance to surpass Federer and Nadal.
There is no difference between improving in chess vs other sports. If you want to be better you have to fix your weaknesses!
All top tennis players have weaknesses, some more, some less. But great ones like Federer, Nadal, Sampras, and Djokovic, etc. found ways to fix them.
Federer won 20 Grand Slam titles
Djokovic and Sampras 14