French Open 2021: Serena Williams beats Danielle Collins reaches fourth round of Roland Garros-Last 16.
Serena Williams remains the highest seed in her half of the French Open draw after a dominant third-round victory against Danielle Collins.
The American seventh seed beat compatriot Collins 6-4 6-4 and will face Kazakhstan's 21st seed Elena Rybakina next.
The Belarusian third seed was beaten 6-4 2-6 6-0 by Anastasia Pavlyuchenkova.
Tamara Zidansek - who beat Katerina Siniakova 0-6 7-6 (7-5) 6-2 - set to meet Romania's Sorana Cirstea in the last 16.
Azarenka, the 15th seed, dominated Madison Keys 6-2 6-2 to reach the last 16.
Rybakina, the 39-year-old will face the two-time Grand Slam winner Victoria Azarenka in the quarter-finals.
Pavlyuchenkova, 29, has never been beyond the quarter-final of a Grand Slam but the Russian 31st seed came from 3-0 down to win the first set against Sabalenka.
Defending champion Iga Swiatek, Elina Svitolina and American Sofia Kenin are the three top-10 seeds left in the top half of the draw, with all three playing their third-round matches on Saturday.