Osaka forced to retire at Australian Open, Sabalenka overcomes wobbles

• Reigning champion battles heat and wind to deny Tauson
• Andreeva, Vekic, Gauff and Badosa all into round four

Switzerland's Belinda Bencic advanced to the last 16 after the two-time champion Naomi Osaka retired during Friday'stheir third-round match with an injury.

Bencic took the first set in a tie-break 7-6 (3) before Osaka, who pulled out of the Auckland final this month due to an abdominal injury, withdrew. Osaka led 5-2 in the opening set but showed signs of struggles with her abdomen and called for a physio during a changeover. The 27-year-old initially soldiered on after treatment before retiring.