Radwanska wins 13th match in a row, into quarters

Melbourne: Agnieszka Radwanska has won her 13th consecutive match of the year, advancing to the Australian Open quarter-finals with a 6-2, 6-4 win over Ana Ivanovic on Sunday.

The No. 4-ranked Radwanska, who won tournaments in Auckland and Sydney ahead of the Australian Open, will play 2011 French Open champion Li Na of China in the quarter-finals. Li beat Julia Gorges of Germany 7-6 (6), 6-1 in an earlier match Sunday.

Radwanska, who lost to Serena Williams in last year's Wimbledon final, advanced to the final eight in Australia for the third consecutive year.