Johannesburg: World number one Serena Williams remained on course for her seventh Australian Open title after overcoming fourth seed Agnieszka Radwanska in the semifinals on Thursday.

Serena Williams
Serena Williams. Pic/ AFP

The 21-time American Grand Slam champion claimed a thumping 6-0, 6-4 win over Radwanska in a one-sided contest that lasted just 64 minutes on Rod Laver Arena, Sport24 reported.

With the win, Serena remains only one win away from matching Steffi Graf's Open-era Grand Slam record of 22 titles.

Serena will next face German seventh seed Angelique Kerber, who claimed a 7-5, 6-2 win over Britain's Johanna Konta, in the summit clash.