Australia Open: Naomi Osaka starts title defence with dominant win

Japan’s Naomi Osaka opened her defence of the Australian Open title with a dominant win over Colombia’s Camila Osorio on day one in Melbourne.

Osaka, also champion in 2019, raced into a 5-0 lead in the first set before world number 50 Osorio fought back.

However, Osaka quickly reasserted her control and wrapped up a 6-3 6-3 win.

After taking a four-month break at the end of last season to protect her mental health, the 24-year-old returns to grand slam action as the 13th seed.

The four-time grand slam champion will play American world number 54 Madison Brengle in round two on Wednesday.