Sabalenka will next clash with No.22 Ekaterina Alexandrova for a place in the quarterfinals. Alexandrova advanced to her first Grand Slams Round of 16 after beating Dalma Galfi 6-0, 6-4.
Also in this quarter are 2021 US Open champion Emma Raducanu, No.12 Liudmila Samsonova, No.13 Beatriz Haddad Maia, No.19 Madison Keys, No.20 Magda Linette, No.30 Leylah Fernandez and Danielle Collins.
The Indian tennis player and her American women's doubles partner Madison Keys lost their first-round encounter 6-4, 6-0 to Veronika Kudermetova and Liudmila Samsonova at the Dubai Tennis Stadium.
Sania Mirza played her last grand slam Australian Open where she partnered Rohan Bopanna and ended up as finalist in mixed doubles. The six-time Grand Slam champion will not feature in any Grand Slam and will soon hang up her racquet.
Fritz was followed by Madison Keys, who defeated Magda Linette 6-4, 6-2. Fritz and Pegula then completed a 5-0 sweep by defeating Lukasz Kubot and Alicja Rosolska in mixed doubles, 6-7(5), 6-4, 10-6. The US team is now 4-0 in mixed doubles in the United Cup.