Interesting point. Never thought about the area behind baseline, but it's a very valid point. I think you're correct that it gives him time, which given his spe

Interesting point. Never thought about the area behind baseline, but it's a very valid point. I think you're correct that it gives him time, which given his speed lets him return even more. I'm personally not a fan of the underhand serve (bit traditional in that regard!), but yeah, it does catch him out sometimes.