In the China Open Round of 16 on Tuesday, No. 73-ranked Naomi Osaka takes on No. 6 Coco Gauff.Osaka earned a two-set win over Katie Volynets (6-3, 6-2) in the Round of 32 in her most recent match

Coco Gauff advanced to the quarterfinals of the China Open after Naomi Osaka was forced to retire due to a back injury f ollowing a tightly contested second set on Tuesday. The match ended with a 3-6, 6-4 scoreline, tied at one set apiece before Osaka could not continue.

Former top-ranked Naomi Osaka started the China Open with a routine 6-3, 6-2 victory over Lucia Bronzetti of Italy to mark her first match with new coach Patrick Mouratoglou in positive style. The four-time Grand Slam champion was the headline act on the opening day and showed her class in closing out the first-round match against the 77th-ranked Italian player in 83 minutes.