NEW HAVEN, CT, USA – Top seed Agnieszka Radwanska overcame an early challenge from 19-year-old Jelena Ostapenko to advance in straight sets in her opening match at the Connecticut Open.

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Radwanska took a wild card into the event in search of extra tune-up matches ahead of the US Open, and she was certainly put through her paces against the young Ostapenko.

“I was actually really surprised,” Radwanska said after the match, which was the pair’s first encounter. “She’s really a very smart and solid player. She’s very young and she can already do everything on court. She can play a really good game and for sure she’s gonna be good.”

Ostapenko and Radwanska traded breaks at the start of the match and held level throughout, with Radwanska’s cerebral game matching up against the teenager’s aggressive style. Ostapenko held a set point at 5-4 on Radwanska’s serve in the first set but was unable to convert as her backhand misfired and the unforced error count did her in. The Pole held her serve and won seven games on the trot to take the opening set and a commanding 4-0 lead in the second before easing through 7-5, 6-1.

Now into the quarterfinals, Radwanska is seeking one more win to end a drought dating back to April: the former World No.2 hasn’t reached a semifinal since the Porsche Tennis Grand Prix in Stuttgart, a streak she’s certainly hoping to snap heading into the US Open.

“I think these kind of matches is always good to have before a Grand Slam,” she said. “It was a great match and I’m really happy I could play my best game. I just hope that I could play the same tennis the next match and be fully prepared for the Grand Slam.”

Radwanska awaits the winner between Caroline Garcia and lucky loser Kirsten Flipkens.

Injuries and withdrawals may have wreaked havoc on the New Haven draw, but Flipkens is one player who’s certainly not complaining. The Belgian was called in at the last minute to replace Lesia Tsurenko, another lucky loser who had to pull out from the main draw with a right knee injury.

“Well, it was a crazy story,” Flipkens said of getting the call to play. “There were so many lucky losers, and I only found out at 12:15 today that I was going to play at two o’clock!”

The Belgian took full advantage of the second chance against Belinda Bencic, defeating the Swiss teenager 6-1, 4-6, 7-5. Bencic served for the match at 5-4 in the third, but Flipkens rallied to win four games in a row and advance.

Along with Radwanska, three other players booked early spots into the New Haven quarterfinals. Ekaterina Makarova grabbed the first quarterfinal berth after a 6-3, 6-2 win over Anastasija Sevastova. Meanwhile, Elena Vesnina booked a clash against the No.10 seed Elina Svitolina. Vesnina made her way to the quarterfinals after Anett Kontaveit retired at 6-4, 1-0, while Svitolina swept past Evgeniya Rodina 6-3, 6-1.