Andy Murray's second-round match against Germany's Tobias Kamke has been delayed because of rain at Wimbledon.
All matches on the outside courts have also been delayed but action is under way on Centre Court where the roof is keeping the elements at bay.
British number one Murray's match is scheduled second on Court One and will see the fourth seed meet 83rd-ranked Kamke for the first time.
Brighter weather is expected later this afternoon but with scattered showers.
Five-time champion Venus Williams opened proceedings on Centre Court against 40-year-old Japanese player Kimiko Date-Krumm.
Top seed Rafael Nadal resumes his title defence against Ryan Sweeting in the second match on Centre Court while eighth seed Andy Roddick takes on Victor Hanescu in the third match under the roof.
Murray's first-round win over Daniel Gimeno-Traver on Monday took place under the Centre Court roof as much of the day's play was rained off, but his second match was scheduled for Court One.
"Being on Centre Court is certainly a big help now because you know that, whatever the weather, you're going to get on, so you can prepare for your match knowing there won't be a lot of stopping and starting," Murray said in his latest BBC column.
"There might be one stop but then you'll be on for the night, so all in all it definitely helps having the roof."
It briefly looked as though a huge shock could be on the cards when Murray lost the first set against Gimeno-Traver.
But he responded in fine fashion to win 4-6 6-3 6-0 6-0 and is looking to pick up where he left off against the Spaniard.
"I'm going to have to play well like I did at the end of the match and make sure I'm on my game right from the start," stated the Scot.
"I practised with him one time before the tournament in Monte Carlo but I haven't seen him play too much before."
Kamke, currently ranked 83 in the world, reached the third round of last year's tournament before losing to Jo-Wilfried Tsonga.
The 25-year-old from Lubeck described Murray as "unbelievable".
"He's such a good player....I watched him last year at the ATP World Tour finals in London when he played Nadal, for example, in the semi-finals," he said.
Murray and Kamke are due on court after Tomas Berdych plays Julien Benneteau and they are followed by another Briton, Anne Keothavong, in her match against eighth seed Petra Kvitova.
"I played her before the French Open," commented Keothavong, who proved too strong for compatriot Naomi Broady. "It was in her home town [Prague] and I was actually leading in the first set, we had a good match.
"It was on clay but her game is more suited to grass and she's going to be tough. But I feel like I'll be able to be a bit more relaxed and just swing out a bit.
"It's a match I'm just looking forward to. She's a lot higher ranked and has a big game, but I'll give it my all and see what happens."
Heather Watson and Laura Robson hope to finally play their opening matches on Wednesday, with Watson scheduled to face Mathilde Johansson first on Court Three and Robson taking on Angelique Kerber second on Court 16.
Officials at the All England Club (AELTC) had to re-organise a number of matches after a downpour brought a halt to proceedings on Monday.
Robson was not given a specific court or time slot on Tuesday's order of play and had to wait until after 2000 BST before being informed she would not be playing.
"Bit of a shambles this evening," the 17-year-old wrote on social networking site Twitter.
An AELTC spokesman said: "With the rain we have had, it was inevitable that there will be one or two frustrations along the way. The referee has had to alter a lot of games in the overall programme."