ISTANBUL, Turkey – The last first round match of the day ended in an upset as Andreea Mitu sent the No.2 seed Yanina Wickmayer crashing out of the TEB BNP Paribas Istanbul Cup, 7-5, 6-4.

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Ranked No.113, Mitu doesn’t often play on the center court, but at the Garanti Koza Arena she didn’t allow the setting to intimidate her.

“It was strange for me to play on such a big court,” the Romanian said. “I am not that used to it so it feels different, but I am confident on clay.”

Mitu and Wickmayer stayed locked into a tense first set despite the No.2 seed bringing up two break points early on. It was Mitu that drew first blood at 6-5 to Wickmayer’s mounting frustration. The Romanian was about to serve for the set when the match was temporarily suspended while the roof closed due to rain. The delay did nothing to improve Wickmayer’s mood, and Mitu quickly took the first set.

Despite finding her composure to start off the second set, Wickmayer was broken twice in the third game and soon found herself facing match points with Mitu serving up 5-3. The Belgian was able to fight them off and stay alive in the match, but the Romanian took the match at her second opportunity to move into the second round.

“It was a good match, even though I never played her before and I struggled at the beginning,” Mitu said after the victory. “My forehand was not working that well, I made a lot of unforced errors so I need to improve that for my next match.”

Mitu moves on to play a familiar opponent: Swiss player Stefanie Voegele, who advanced 6-2, 7-5 over Turkish wildcard Ipek Soylu.

“I know Stefanie pretty well, we practiced together the other day,” Mitu said. “I expect I tough one!”

No.4 seed Kirsten Flipkens overcame a spirited start from Donna Vekic, fighting through exhaustion to make her way into the second round, 7-6(5), 6-4.

“It was a tough one,” Flipkens said afterward. “After Fed Cup it´s very hard because it takes a lot of energy playing for the team. Even though it´s Wednesday I am still pretty tired but I am very happy that I pulled it off.”

Flipkens goes on to play Kateryna Kozlova in the next round. The Ukrainian advanced past Alexandra Dulgheru in a tight three sets, emerging victorious 6-7(6), 7-6(3), 6-1.

Also into the second round are Greek qualifier Maria Sakkari, who backed up her upset of top seed Anna-Karolina Schmiedlova with a win over Hsieh Su-Wei 6-3, 6-4, and No.5 seed Danka Kovinic.