The Frenchman spent time practicing with Federer and was impressed by what he saw.
Both had high praise for the King of Clay during Roland Garros media day on Friday.
The American has been sabotaged by health issues in recent years, but is on the up.
Stefanos Tsitsipas, after a solid clay court season, says he may have yet another surprise for fans in Paris.
US Open champion shares essential element to a deep Roland Garros run.
Naomi Osaka won't do press in Paris; Rafa Nadal offers his view on that stance.
The American legend likes what he sees in Sabalenka's clay-court game.
