PARIS — Another day on the clay at the French Open, another reigning Australian Open champion bites the red dust.

Li Na lost her first Grand Slam match since winning the title in Melbourne, falling to Kristina Mladenovic of France 7-5, 3-6, 6-1 on Tuesday. The loss came a day after men’s Australian Open champion Stan Wawrinka was eliminated in the first round.

Li, who won the French Open title in 2011, ended up with 37 unforced errors on a cool and overcast day at Roland Garros. Mladenovic had only 25 errors.

On Monday, Wawrinka lost to 41st-ranked Guillermo Garcia-Lopez of Spain 6-4, 5-7, 6-2, 6-0.

This is the first time that both Australian Open champions have lost in the first round at Roland Garros. The last Australian Open women’s champion to lose in the first round was Lindsay Davenport in 2000.

Earlier, fourth-seeded Simona Halep made it through to the second round while Japanese veteran Kimiko Date-Krumm didn’t.

Halep won 11 straight games at the start and beat Alisa Kleybanova of Russia 6-0, 6-2.

The 22-year-old Romanian has never been past the second round at Roland Garros, but she entered the clay-court major as one of the favorites.

Playing on Court Philippe Chatrier, the main stadium at Roland Garros, Halep raced through the first set and then won the first five games of the second. But she was broken while serving for the match the first time.

Halep finished with only six unforced errors.

Date-Krumm, the oldest woman in the field at 43, had an up-and-down match against 24th-seeded Anastasia Pavlyuchenkova of Russia, eventually losing 6-3, 0-6, 6-2.