Love the Legends of Tennis
Join Date: Jan 2002
Location: Sydney, Australia
Definately grass. If you ever play someone who slices on grass you would't even have to ask this question. The ball just skids so low it makes it very awkward.
On clay, a slice shot does not have much of an impact. It just sits there, and although it doesn't bounce that high, you can still attack it.
Also, a slice is very effective on synthetic grass - and we have a LOT of that in Sydney Australia. Great surface BTW. I wished the Aussie Open was played on it. Good cushioning and it's a great compromise between hardcourt and grass. You can still stay back and have baseline rallies or it can also suit a S&V player.