Wimbledon champion Elena Rybakina pulls out of French Open due to illness as Coco Gauff and Iga Swiatek advance

Coco Gauff fought off the challenge of 16-year-old Mirra Andreeva to reach round four on Saturday while the French Open lost one of its favourites to illness.

Wimbledon champion Elena Rybakina withdrew minutes before she was due to take to Philippe Chatrier to face Sara Sorribes Tormo, revealing she was struggling with a virus.

Gauff and Andreeva's combined age is younger than Novak Djokovic, and the American teenager looked like she could lose to a player her junior for the first time in her senior career.

But Andreeva was unable to sustain the level she showed in winning the first set and ended her debut grand slam with a 6-7 (5) 6-1 6-1 defeat.

The Russian is undoubtedly a player of huge potential, though, and she more than matched Gauff during a high-class first set full of fierce shot-making.

The 19-year-old, who was facing a younger opponent for just the third time, served for it at 5-4 but Andreeva broke back and then converted a lead in the tie-break.

There were moments of youthful petulance from Andreeva that she will need to stamp out, particularly an incident late in the tie-break when she swiped a ball angrily into the crowd.

She earned a code violation but was fortunate she did not hurt a spectator, which could have seen her defaulted.

Top seed Iga Swiatek, meanwhile, defeated an opponent 6-0 6-0 for the fourth time in her career and first at a grand slam.

China's Wang Xinyu was the unfortunate recipient as Swiatek hit top form at Roland Garros - four of the six sets she has played so far this year have now been bagels.

The major barrier to the Pole reaching the final appeared to be a projected last-four clash with Rybakina, who she has lost to three times this season.

Explaining her withdrawal, the fourth seed said: