Canadian Milos Raonic jumped six spots to No. 25 in the ATP world rankings after his victory at the Chennai Open over the weekend.
The hard-serving 21-year-old from Thornhill, Ont., defeated top-seeded Janko Tipsarevic of Serbia 6-7 (4), 7-6 (4), 7-6 (4) in the final of the Chennai Open on Sunday for his second career ATP World Tour victory.
Novak Djokovic, also of Serbia, remained in top spot, well ahead of Rafael Nadal of Spain and Roger Federer of Switzerland.
The top three also remained the same on the women's rankings list. Caroline Wozniacki of Denmark was No. 1, followed by Petra Kvitova of the Czech Republic and Victoria Azarenka of Belarus.
Rebecca Marino of Vancouver rose one spot to No. 63. Marino won her first match in the qualifying round at the Moorilla Hobart International in Hobart, Australia, last Friday before losing in the second qualifying round to fellow Canadian and world No. 104 Aleksandra Wozniak.
Marino's next scheduled start is at the Australian Open next week, according to her website.
In men's doubles, Daniel Nestor of Toronto and Belarusian partner Max Mirnyi share third spot behind American twins Bob and Mike Bryan, who are tied for first. Nestor and Mirnyi were victorious at the Brisbane International over the weekend.
Raonic, who peaked at No. 25 in the rankings during his breakthrough season last year, won all 48 of his service games last week at the Indian event. He became the first player to win a tournament without dropping serve since Federer did it at the 2008 grass-court event in Halle, Germany.
Raonic is 2-1 in ATP World Tour finals, claiming his first title in San Jose last February. He followed that up a week later by reaching the final in Memphis before losing to American Andy Roddick.
Raonic started the 2010 season at No. 156 in the rankings and went on to win the ATP newcomer of the year award.
He will next play in an exhibition event in Kooyong, Australia, as a tune-up ahead of the Australian Open in Melbourne this month. Raonic will be the 23rd seed in the men's singles draw.