Heather Watson into top 40

Britain's Heather Watson hits a forehand return during her match against Agnieszka Radwanska at the Australian Open tennis championship on January 18, 2013
© AP Photos
Britain's Heather Watson climbs inside the world's top 40 for the first time in her career.

Britain's Heather Watson has moved inside the world's top 40 for the first time, but Laura Robson remains in 43rd position.

Watson, 20, has risen one spot from 40th after a successful year, making it a career best for the Guernsey-born youngster.

Serena Williams, who is currently suffering with a lower back injury, remains in first position, with the only change in the top 10 seeing Petra Kvitova move into seventh ahead of Sara Errani.

For the men, Novak Djokovic remains ahead of Roger Federer and Andy Murray, who sit second and third respectively.

Novak Djokovic poses with the trophy after defeating Andy Murray in the men's final at the Australian Open on January 27, 2013
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ATP RankingsPoints
1Scotland flag Andy Murray7,750
2Spain Rafael Nadal7,555
3Switzerland Roger Federer7,145
4Switzerland Stanislas Wawrinka5,780
5Serbia Novak Djokovic5,325
6Croatia Marin Cilic5,155
7Alexander Zverev4,470
8Austria Dominic Thiem4,030
9Japan Kei Nishikori3,285
10Canada Milos Raonic3,230
11Bulgaria Grigor Dimitrov3,070
12France Jo-Wilfried Tsonga2,770
13Belgium David Goffin2,560
14Spain Roberto Bautista Agut2,425
15Czech Republic Tomas Berdych2,390
16United States Jack Sock2,335
17Pablo Carreno Busta2,305
18Lucas Pouille2,220
19United States John Isner2,110
20United States Sam Querrey2,060