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World No.4 Rybakina rarely looked like being troubled by Sherif, easing to a 6-1 6-4 triumph, winning 22 of her 26 first-serve points on her way to victory.

The 2022 Wimbledon champion broke Sherif's serve twice in the first set to gain control of the match, before holding her serve five times in the second to ensure victory.

In reaching the last 16, Rybakina again showed her class on clay.

Her victory over Sherif saw her become only the fourth player in the past 10 years to win 14 straight WTA matches on clay, alongside Serena Williams, Simona Halep and Iga Swiatek.

Additionally, Rybakina's 475 winners at WTA-1000 events in 2024 are 112 more than the next best, Danielle Collins with 363.

Also into the last 16 in Madrid are Yulia Putintseva and Daria Kasatkina, who beat Caroline Dolehide and Anastasia Pavlyuchenkova respectively, both in straight sets.

However, world No.7 and reigning Wimbledon champion Marketa Vondrousova is out after she was upset by Mirra Andreeva, losing 7-5 6-1.