Cincinnati, Aug. 12 -- World number 10 Elena Rybakina secured her round of 16 spot in the ongoing Cincinnati Masters tournament on Tuesday, while the defending champion and world number one Aryna Sabalenka also registered her name in the history books during her win.

Rybakina regrouped herself after a first-set loss, prevailing 4-6, 6-3, 7-5 in a three-set thriller.

Also, Madison Keys, the current Australian Open champion, defeated Aoi Ito 6-4, 6-0 for her spot in the pre-quarters.

On Monday, Sabalenka prevailed over Emma Raducanu by 7-6 (3), 4-6, 7-6 (5) in a contest that lasted three hours and nine minutes. This was also the fourth-longest match of Sabalenka's career.

In the first-set tie-break, Sabalenka won six of seven points, hi...