Wimbledon 2021: 13 American women, 8 men into Round 2

Twenty-one of the 34 Americans in the Wimbledon men's and women's singles draws advanced in an opening round that spanned three days in rainy London. Thirteen of 21 women notched Round 1 victories, along with eight of 13 men. The 13 U.S. women in Round 2 are the most since 1996, when Team USA had 15 women in the second round.

Frances Tiafoe, fresh off his first professional grass-court title in Nottingham, scored the headline result of Round 1 by upsetting No. 3 seed and Roland Garros finalist Stefanos Tsitsipas, 6-4, 6-4, 6-3. It was the best win of Tiafoe's career, rankings-wise, as world No. 4 Tsitsipas is the first Top 5 player he has beat. (He has three additional Top 10 wins.) After the Monday victory on Court 1, Tiafoe will take on Vasek Pospisil on Wednesday as he bids to reach the third round at Wimbledon for the second time in his career.

Also taking out men's seeded players in Round 1 were Sam Querrey (def. No. 11 Pablo Carreno Busta), Sebastian Korda (def. No. 15 Alex de Minaur) and Denis Kudla (def. No. 30 Alejandro Davidovich Fokina). 

Taylor Fritz is the lone remaining American seed in the men's draw, after he battled past qualifier Brandon Nakashima, 7-5, 3-6, 6-4, 7-5, in a battle of San Diego natives. Less than one month after undergoing post-French Open knee surgery, Fritz will face another American—Steve Johnson—in Round 2. Tennys Sandgren and Marcos Giron round out the eight American men in the second round.

On the women's side, Sloane Stephens knocked off 10th seed and two-time Wimbledon champ Petra Kvitova, 6-3, 6-4, on Tuesday. Stephens, who reached the Wimbledon quarterfinals in 2013, reached the fourth round at Roland Garros earlier in June as she seeks to return to the sort of form that saw her win the US Open and Miami Open, and reach the French Open final in the space of 10 months in 2017-18.

Read more on ATPTour.com: Tiafoe, Stephens bond over journey to Wimbledon success

Four seeded American women advanced to Round 2: No. 4 Sofia Kenin, No. 20 Coco Gauff, No. 22 Jessica Pegula and No. 23 Madison Keys. Serena Williams, the sixth seed, was forced to retire early in her opening-round match against Aliaksandra Sasnovich after she injured her right leg on Centre Court.

The other advancing Americans in the women's draw are: Venus Williams, CoCo Vandeweghe, Kristie Ahn, Lauren Davis, Danielle Collins, Madison Brengle, Shelby Rogers, Claire Liu. There are three all-American matches set for Round 2: Stephens vs. Ahn, Keys vs. Davis, and Kenin vs. Brengle.

The Wimbledon men's and women's doubles events begin on Thursday. Rajeev Ram is seeded sixth in the men's draw, alongside Britain's Joe Salisbury, while Nicole Melichar and partner Demi Schuurs are seeded fourth in the women's draw. Two all-American duos are also seeded in the women's draw—No. 12 seeds Gauff and Caty McNally, and No. 14 seeds Pegula and Asia Muhammad.

For complete singles and doubles draws, daily schedules and more, visit the official Wimbledon website.