WATCH: Muguruza breaks down in press after Paris loss

Paris, the site of 2016 champion Garbine Muguruza's greatest career achievement, is now also the site of her most frustrating day. On Sunday, she lost to France's Kristina Mladenovic in the fourth round, 6-1, 3-6, 6-3.

While the defending French Open champion isn't a stranger to tough losses, this one was especially taxing as the French crowd was overwhelmingly against her.

“The crowd today was a little bit tough for me,” Muguruza said. “I understand [but] I just think that they should be a little bit more respectful. We had to stop. The chair umpire has to always calm the crowd down. I’m not here to create enemies. I mean, I love playing here. It’s not a good feeling.”

Cheers for the Spaniard's double faults and barely any applause when she won points had Muguruza frustrated.

She gave the audience a little sass as she walked off the court after her defeat.

Her coach, Sam Sumyk, hasn't tweeted since 2016, but felt compelled to defend his charge:

The real breakdown didn't occur until after the match when Muguruza held back tears as a reporter asked her if Mladenovic shouting in Italian during the match annoyed her.

Muguruza took a short break to compose herself before returning and answering the question with even more sass.

"No, I think she speaks like 25 languages I heard, so..." she said.

Mladenovic is joined in the quarterfinals by compatriot Caroline Garcia, marking the first time since 1994 that two Frenchwomen have made it this far in Paris.

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