Andy Roddick will start on Centre Court as he attempts to finish his match against Paul-Henri Mathieu.
Roddick, the number three seed, will resume 6-2 6-5 up against the Frenchman.
It is a similar story for fourth seed Novak Djokovic, who will continue the third set of his clash with Nicolas Kiefer in the opening match on Court Two.
Venus Williams and Maria Sharapova also resume their fourth-round encounter having played just three points - they are second on Centre Court.
The pair were moved out to Court Three late on Tuesday in an attempt to get their match played but they managed just three points before the final deluge of the day.
And third on Centre Court, top seed Justine Henin is due to play seventh seed Serena Williams in the pick of the women's quarter-finals.
Henin, who beat Serena on her way to the French Open title last month, says the pair's frosty relationship has improved recently.
"I think it's been much better in the last few months," said the Belgian. "The past is the past. We have a lot of respect for each other. No, it's been good in the last few months.
"I wouldn't say we chat a lot. But, no, the atmosphere is pretty good in the locker room, so there is no worry about that."
Meanwhile, men's number one Roger Federer will have his feet up for the fifth day running.
The Swiss beat Marat Safin in his third-round encounter on Friday and refuses to let the weather get him down.
"It's a long break but I just have to make sure I hit the ball a bit and try to keep ticking over," Federer told BBC Sport.
"I refuse to play indoors so I wait for the odd dry spell to practise. It'll be fine.
"You just have to be patient. It's really hard for the players but that's Wimbledon and you have to deal with it."
