Some soccer teams wet the field before a match to make the ball roll faster, while baseball teams grow out grass to slow ground balls.

WSJ: In Golf Rivalry, Important Equipment Includes a Mower

White balls discoloured by the grass are difficult for fielders and batsmen to see in certain light conditions.

BBC: Pink ball makes debut at Lord's

"He used to (serve and volley), but I think the conditions of the grass have changed so much -- the balls are probably heavier, the courts are much, much slower, so there is far less serve and volley, " Henman told CNN.

CNN: Death of a tennis art: Is this the end for serve and volley?