Gael Monfils, former no.7 ATP tennis player in the world, likes padel. So you can see from this video, where he is enjoying a nice and long padel session with other tennis players.
Clearly he is not very good at playing padel. For example, that he defends and attacks from the wrong positions and he lacks the knowledge of several important padel techniques, such as the “bandeja” and the “lobb”. However, he is highly coordinated and fit. Without too much training he could play a high 2nd class or low 1st class Padel.

Time will tell if he continues to learn to play padel. Surelly, he is having a lot of fun already.

EXTRA: Below you can see an interview (in French) where he talks about Padel, as well as American Paddle.