Serena Williams has won the Australian Open, beating Maria Sharapova in the final 6-3 7-6 (7-5).

Serena Williams overcame a spirited challenge from fellow American Madison Keys to become the oldest Australian Open finalist in the Open era today.

TENNIS: Rafael Nadal hailed an "amazing" act of sportsmanship from his opponent after overcoming nausea and dizziness to avoid a shock defeat in the second round of the Australian Open.

Maria Sharapova saved two match points on the way to a dramatic victory over her little-known fellow Russian Alexandra Panova at the Australian Open.

Petra Kvitova became the first reigning Wimbledon champion to lose in the first round of the US Open in the Open era last night.