Angelique Kerber, the former world No. 1 from Germany, suffered an early exit in the US Open on Monday at the hands of France’s Kristina Mladenovic.

The 2016 US Open champion fell 7-5, 0-6, 6-4 in the first round to Mladenovic, who had lost four of the five previous meetings with Kerber. The hard-fought match took 2 hours and 23 minutes.

Mladenovic saved 10 of 12 break points in the first and third sets combined against the No. 14 seed, helping her secure the win despite getting bageled in the second set. She’ll face fellow Frenchwoman Fiona Ferro in the second round.

Ashleigh Barty survived a scare in her first-round match. The No. 2 seed and reigning French Open champion lost the first set 6-1 to Zarina Diyas before winning the final two sets 6-3, 6-2 to advance to the second round.