American Shelby Rogers, ranked so low that she only just scraped in as a direct entry to the French Open, backed up her stunning win over Petra Kvitova to beat Romania's 25th seed Irina Begu 6-3 6-4 and burst into tears at the end at the end of the match.
"Tears all the time," the 23-year-old world number 108, told a news conference after her fourth-round win.
"Sad, happy, hungry, reading a book, watching a movie. They flow very easily."
Whether or not she will be exercising her tear ducts on Tuesday depends how she performs against fourth seed Garbine Muguruza who maintained her impressive form on Sunday with a 6-3 6-4 defeat of 2009 champion Svetlana Kuznetsova.
Muguruza, 22, lost her opening set here this year but has been faultless since to reach a third consecutive French Open quarter-final to stay on course to become the first Spanish woman to lift the trophy since Arantxa Sanchez Vicario in 1998.
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For the second time in a week Samantha Stosur's French Open charge has been halted by the temperamental Parisian weather.
Stosur, whose first-round match with Japan's Misaki Doi was played across two days due to persistent rain which forced a backlog of clashes, was able to get through just 44 minutes of her fourth-round clash with sixth seed Simona Halep on Sunday night.
The 21st seed is down a break and trails 5-3 in the first set against Halep, with a quarter-final spot against either world No.2 Agnieszka Radwanska or Bulgaria's Tsvetana Pironkova on the line.
Radwanska held a healthy 6-2 3-0 over Pironkova before their match was also halted due to rain.
Play will resume on Monday at 11am (1700 AEST), although more rain is forecast.
