A rain-affected Tuesday means Wimbledon has some catching up to do, but second-round action nonetheless begins in earnest on Wednesday at the All England Club. We preview the key matchups and look inside the numbers here on wtatennis.com, courtesy of contributor Chris Oddo.

Wednesday

Second Round

[5] Simona Halep (ROU #5) vs. Francesca Schiavone (ITA #111)
Head-to-head: Schiavone leads, 1-0
Key Stat: Schiavone snapped a three-year Wimbledon losing streak with her first round win on Monday.

Simona Halep has only won back-to-back matches at SW19 on one occasion, but that occasion was quite special because it led to an appearance in the semifinals in 2014. Can the Romanian, who has suffered from patchy form and a nagging Achilles injury in recent months, rekindle the magic on grass this year? Standing in her way will be one of the tour’s most revered veterans in Francesca Schiavone. The 36-year-old snapped a three-year Wimbledon drought on Monday with a straight set win over Anastasija Sevastova, but the challenge will be elevated on Wednesday when the Italian tries to win against a Top 10 player on grass for the first time. Halep had to skip Birmingham with injury, but she told reporters on Monday that despite her lack of match play on grass this summer, her extra practice time on the surface is starting to pay off. “I had many days practicing here,” she said. “I feel the grass. I feel the court. I feel the atmosphere here… I’m looking forward for the next round, and maybe I will play better after two days.”

Pick: Halep in two

[9] Madison Keys (USA #9) vs. Kirsten Flipkens (BEL #51)
Head-to-head: Tied, 1-1
Key Stat: Keys enters on six-match winning streak.

Madison Keys, American storm. The 21-year-old may possess a calm and easy going demeanor, but it’s clear to anyone that watches her play that she enjoys playing rock-n-roll tennis when she’s on court. She did that to great effect in winning the Birmingham title a few weeks back and she looked stunning in hammering her way past Germany’s Laura Siegemund on Day 1. But Keys knows her next test against the crafty Belgian Kirsten Flipkens will force her to problem solve a bit more. Will she prove up to the task? She says she’s ready. “It will be tough,” she told reporters on Monday, when asked about the challenge of facing the former Wimbledon semifinalist. “I played her in Miami. It was a tough match. She’s obviously done well on grass before and can be really crafty, is really good with dropshots and slices and mixing it up. That’s going to be a tough match. I think I’ll have to go in with a similar game plan as I did today.”

Pick: Keys in two

Sabine Lisicki (GER #81) vs. [14] Sam Stosur (AUS #16)
Head-to-head: Stosur leads, 5-2
Key Stat: Lisicki improved to 26-7 lifetime at Wimbledon with her win over Shelby Rogers on Monday.

Samantha Stosur holds the significant edge in the pair’s head-to-head, but Sabine Lisicki’s Wimbledon magic could play a role in the eighth meeting between these two hard-serving veterans. Stosur, making her 14th Wimbledon appearance, is well aware of the Lisicki aura at SW19. “I mean, it’s no doubt this is a tournament she feels very comfortable at no matter kind of what she’s been doing in the lead-up,” Stosur said. “I’m sure when she walks through the gates here she probably feels like she’s No. 1 in the world. You have to be aware of that and know she has a very big serve.” Lisicki has won just two of seven tilts against the Aussie, but she’s once again brimming with confidence and a certain je ne sais quoi at Wimbledon. “I really liked this place from the beginning,” she said. “I think in this place you feel the history. It’s just a magical place. When I come here, I just feel really special to have the opportunity to play here.”

Pick: Lisicki in three

Around the Grounds: Garbiñe Muguruza will look to continue her eight-match winning streak at major tournaments when she takes on world No.124 Jana Cepelova of Slovakia. Muguruza owns a 6-1 record against players ranked outside of the Top 100 at majors. Venus Williams will square off with Greek qualifier Maria Sakkari. World No.115 Sakkari won her first Wimbledon match on Monday; Williams owns 77 wins at the All England Club, second only to her sister Serena among active players. Karolina Pliskova will continue her quest to make the second week of a major for the first time when she meets Misaki Doi on Day 2. In 16 major appearances, Pliskova has only reached the third round three times.

By the Numbers:

8 – Number of Wimbledon finals that Venus Williams has played, winning five.

89 – Percentage of first-serve points that Stosur won in her Day 1 victory over Magda Linette.

18 – Number of American women that entered the main draw – most of any country.

122 – The speed of Sabine Lisicki’s fastest serve on Day 1, which was the fastest recorded by all players in action on Monday.