The Italian, back into the semifinals of a major, was given a warning for a code violation.

The world No. 1 is 4-8 against the Pole overall, and 1-5 on clay.

"I've hit a small setback in my recovery and unfortunately won't make it back for grass season this year," the 30-year-old posted on social media.

"She was full out shaking her whole bag like it was an empty cookie jar on Chatrier," Tiafoe said, laughing. "I'm going to keep ripping her for a long time."

Paolini entered the fourth-round match on a nine-match winning streak on clay, having won the WTA 1000 in Rome.

Paul leads a contingent of in-form U.S. men, eight of whom reached the second week in Paris.

When the world No. 1's opponent, Jiri Lehecka, finally got on the scoreboard, the Court Suzanne-Lenglen crowd responded with a standing ovation.

"I will definitely watch it if I'm not playing (in the) night session," Novak Djokovic said with a big smile. "FYI, Roland-Garros schedule."

Alcaraz labored past Damir Dzumhur 6-1, 6-3, 4-6, 6-4 in the night session, coming from a break down in the fourth set.

Neither Swiatek nor Sabalenka has lost even a set so far in Paris.