No particular clause is in effect for this contest.  Nobody's proven themselves on grass except for Djokovic and he's just recently had a surgery.

1. Pick quarterfinalists, semifinalists and champions for both ATP and WTA draws. You will receive 7.5 points for each correct quarterfinalist, 5 points for each correct semifinalist and 20 points for each correct champion.

2. SUBSTITUTE PICK: Pick a player from each draw to replace one of your quarterfinalists. If this player makes the quarters, they will take the place of whomever you picked in that section of the draw.

3. BIGGEST LOSER: pick the highest seed that will lose in the earliest round from each draw. The player must be a top-16 seed. You get 5 points if your seed is the highest to lost and 2 points if your seed falls in the same round as the highest seed to lose.

Picks must be posted by the time play begins or soon afterwards.