I think a guy with mediocre groundstrokes but amazing speed can manage. You can make it work if you hit the ball with enough depth, as you said, if you have shitty groundstrokes, hitting them deep can somewhat hide that, make it harder to get attacked. It depends on how poor the groundstrokes are. Because Monfils hits some serious garbage balls but is able to get away with it because players are intimidated with his speed/acceleration.
yes but for athleticism, movement and footwork, Nadal should have been taken as the model, not Monfils :
I would take Nadal's athleticism 10 times over his so-called "mental toughness".
Even Ferrer has a great movement but with a light body it's far far less impressive than Nadal's movement who does that with strong legs and body.