Western and Southern Open 2018: Nick Kyrgios, Karolina Pliskova Advance

The 2018 Western and Southern Open continued Tuesday, with first-round action wrapping up and the second round getting underway.

Fresh off a straight-set victory over Daria Gavrilova, Serena Williams is set to take the court Tuesday night against eighth-seeded Petra Kvitova. Second-seeded Roger Federer will open his tournament as well, facing off with Peter Gojowczyk in the second round.

Karolina Pliskova, Nick Kyrgios and Elina Svitolina are among the others included on Tuesday's schedule. The full schedule is available on the Wester and Southern Open's official site.

Here's a look at the scores from Mason, Ohio, and a recap of the day's biggest matches.

Men's Singles Results

No. 2 Roger Federer def. Peter Gojowczyk: 6-4, 6-4

No. 11 David Goffin def. Stefanos Tsitsipas: 7-5, 6-3

Denis Shapovalov def. No. 14 Kyle Edmund: 6-4, 7-5 

No. 15 Nick Kyrgios def. Denis Kudla: 6-7(2), 7-5, 7-6(9)

Leonardo Mayer def. No. 16 Lucas Pouille: 7-6(7), 6-4

Hyeon Chung def. Jack Sock: 2-6, 6-1, 6-2

Milos Raonic def. Dusan Lajovic: 6-3, 6-3

Marius Copil def. Philipp Kohlschreiber: 6-4, 6-2

Robin Haase def. Filip Krajinovic: 4-6, 6-2, 6-3

Karen Khachanov def. Albert Ramos-Vinolas: 2-6, 6-3, 6-2

Borna Coric def. Daniil Medvedev: 6-2, 6-3

Marton Fucsovics def. Hubert Hurkacz: 4-6, 6-3, 7-6(6)

Mischa Zverev def. Damir Dzumhur: 6-3, 6-4

Women's Singles Results

No. 5 Elina Svitolina def. Svetlana Kuznetsova: 7-6(1), 4-6, 6-4

No. 6 Caroline Garcia def. Victoria Azarenka: 6-4, 7-5

No. 8 Petra Kvitova def. Serena Williams: 6-3, 2-6, 6-3

No. 9 Karolina Pliskova def. Agnieszka Radwanska: 6-3, 6-3

Petra Martic def. No. 12 Daria Kasatkina: 4-6, 6-4, 6-3 

No. 15 Elise Mertens def. Magdalena Rybarikova: 6-4, 6-2

No. 16 Ashleigh Barty def. Marketa Vondrousova: 6-3, 7-5

Amanda Anisimova def. Timea Babos: 6-3, 6-4

Ekaterina Makarova def. Ana Bogdan: 6-3, 6-2

Maria Sakkari def. Naomi Osaka: 6-3, 7-6(8)

Tatjana Maria def. Allie Kiick: 5-7, 6-3, 6-3

Kaia Kanepi def. Varvara Lepchenko: 2-6, 6-3, 6-1

Kiki Bertens def. Coco Vandeweghe 6-2, 6-0

Camila Giorgi def. Anastasija Sevastova: 6-2, 6-3

Anastasia Pavlyuchenkova def. Aleksandra Krunic: 6-1, 6-0

Kristina Mladenovic def. Viktoria Kuzmova: 6-3, 6-0

Notable Matches

No. 8 Petra Kvitova def. Serena Williams: 6-3, 2-6, 6-3

Serena Williams' summer isn't going as planned.

In her first appearance since a first-round loss to Johanna Konta at the Silicon Valley Classic, Williams bowed out in three sets at the hands Petra Kvitova on Tuesday night.

Serena finished with a whopping 36 unforced errors, which overshadowed her superior first-serve percentage (61-58) and edge in winners (27-24).

According to Tennis Abstract (via the New York Times' Ben Rothenberg), Williams has lost her last three matches against top-10 opponents. She'll hope to reverse that trend at the U.S. Open later this month in New York City.

Kvitova, meanwhile, improved to 2-5 lifetime against Williams. Next up is a third-round date with Kristina Mladenovic—who dispatched Viktoria Kuzmova in straight sets. 

No. 9 Karolina Pliskova def. Agnieszka Radwanska: 6-3, 6-3

Entering Tuesday, Pliskova was winless against Agnieszka Radwanska in her first seven tries. Even worse, she had yet to take even a set off the 2012 Wimbledon runner-up.

Pliskova ended that run in emphatic fashion. The No. 9 seed prevailed in straight sets.

On Monday, Pliskova dropped coach Tomas Krupa and brought former coach Rennae Stubbs back into the fold. David Kane of the WTA's official site thought the move paid immediate dividends:

Pliskova was far from her best. She had four aces—the last of which came on match point—and won 78 percent of her first-service points. But she also committed five double faults and won only 39 percent of her second-service points.

As the final score would suggest, though, the 2016 champion enjoyed stretches where she simply overpowered Radwanska:

Pliskova will meet Aryna Sabalenka in the second round. The 20-year-old Sabalenka is coming off a three-set victory over Johanna Konta.

No. 15 Nick Kyrgios def. Denis Kudla: 6-7(2), 7-5, 7-6(9)

Kyrgios narrowly edged out a three-set win over Denis Kudla on Tuesday afternoon.

Things didn't begin well for Kyrgios. He arrived courtside only to find he had forgotten to pack the necessary footwear:

Fortunately for Kyrgios, that wasn't an omen of things to come:

There was only one service break over the course of the match, which provides a good insight into how things unfolded. Kudla had 20 aces and won 85 percent of his first-service points, but it still wasn't enough to upset Kyrgios. The 23-year-old Australian had 39 aces and dropped only eight of his 66 first-service points.

Kudla saved four match points in the third-set tiebreaker to go ahead 8-7 and have a match point of his own. Kyrgios won four of the next five points, though, to seal passage to the second round.

No. 6 Caroline Garcia def. Victoria Azarenka: 6-4, 7-5

Sixth-seeded Caroline Garcia had her hands full with two-time Australian Open champion Victoria Azarenka.

Garcia didn't get off to a great start in the opening set, dropping serve in the first game and falling behind 0-2. She recovered to win the next two games, with service breaks a theme throughout the opening frame. Garcia and Azarenka combined to drop serve five times in the opening 10 games.

Garcia had an opportunity to serve for the set up 5-3 but quickly fell down 0-40 before eventually losing the game. She stepped up when she needed to, though, hitting a forehand winner down the line to take the first set:

Azarenka appeared to be in control in the second set after jumping ahead 5-3. She proceeded to lose the next four games en route to defeat.

Garcia awaits the winner of Sabalenka vs. Pliskova in the third round.

No. 2 Roger Federer def. Peter Gojowczyk: 6-4, 6-4

Federer's last appearance at the Western and Southern Open came in 2015, when he defeated Novak Djokovic in the final. The 37-year-old Swiss is a seven-time champion, and he's on his way to making it eight with a straight-set win over Peter Gojowczyk:

Federer was a bit fortunate to survive the first set, as he surrendered five break-point opportunities. He saved all five, three of which came in the eighth game with Gojowczyk looking to tie the set.

Federer was better in the second set, losing just six points on serve. Earning a service break in the first game was the opening he needed to seal the victory.

In the third round, Federer will play Leonardo Mayer, who upset 16th-seeded Lucas Pouille on Tuesday. Federer won each of their first two meetings, the last of which was at the 2015 U.S. Open.