<p>Roger Federer wants more blood testing done in tennis to help keep the sport clear of doping, the 17-time Grand Slam champion said on the eve of the ATP World Tour Finals. <br /><br /></p>.<p>Britain's newly-crowned US Open champion Andy Murray raised the subject this week at the Paris Masters, suggesting there needed to be more out-of-competition checks. <br />World Tour Finals title holder Federer said his Scottish rival had a point. <br /><br />"I feel I’m being less tested this time now than six, seven, eight years ago,” the Swiss told a news conference at London’s O2 Arena. <br /><br />“I don’t know the exact reasons why we are being tested less and at this moment I agree with Andy, we don’t do a lot of blood testing during the year. <br /><br />“I think it’s important to have enough tests. I don’t like it when I’m only getting tested whatever number it is, which I don’t think is enough or sufficient during the year so I think we should up it a little bit or a lot,” Federer added. <br /><br />“It’s key and vital the sport stays clean. It’s got to. We have a good history in terms of that and we want to make sure it stays that way.”<br /><br />According to figures on its website the International Tennis Federation, the sport’s governing body, carried out only 21 out-of-competition blood tests in the professional game in 2011. <br /><br />Cycling’s governing body the UCI carried out more than 3,314 out-of-competition blood tests in the same year. <br />Petrova crowned<br /><br />Russia’s Nadia Petrova thrashed top-seeded Dane Caroline Wozniacki 6-2, 6-1 in Sofia on Sunday to secure her maiden Tournament of Champions trophy and a 13th career title. <br />It was the 30-year-old’s third tournament victory of the year after winning a Wimbledon warm-up event in Den Bosch, Netherlands and the Pan Pacific Open in Tokyo in September. <br /><br />“It’s a great way to finish the season,” Petrova said after receiving the trophy. <br />Winning the season-ending WTA event at the Armeets Arena in Sofia earned second seed Petrova a cheque for $270,000 and helped her rise one place in the world rankings to 12th. <br /><br />Wozniacki began 2012 as the world number one but endured a mediocre season and had to wait until September to land her first trophy of the year at the Korea Open. <br />The Dane then won the Kremlin Cup in October. <br /></p>
<p>Roger Federer wants more blood testing done in tennis to help keep the sport clear of doping, the 17-time Grand Slam champion said on the eve of the ATP World Tour Finals. <br /><br /></p>.<p>Britain's newly-crowned US Open champion Andy Murray raised the subject this week at the Paris Masters, suggesting there needed to be more out-of-competition checks. <br />World Tour Finals title holder Federer said his Scottish rival had a point. <br /><br />"I feel I’m being less tested this time now than six, seven, eight years ago,” the Swiss told a news conference at London’s O2 Arena. <br /><br />“I don’t know the exact reasons why we are being tested less and at this moment I agree with Andy, we don’t do a lot of blood testing during the year. <br /><br />“I think it’s important to have enough tests. I don’t like it when I’m only getting tested whatever number it is, which I don’t think is enough or sufficient during the year so I think we should up it a little bit or a lot,” Federer added. <br /><br />“It’s key and vital the sport stays clean. It’s got to. We have a good history in terms of that and we want to make sure it stays that way.”<br /><br />According to figures on its website the International Tennis Federation, the sport’s governing body, carried out only 21 out-of-competition blood tests in the professional game in 2011. <br /><br />Cycling’s governing body the UCI carried out more than 3,314 out-of-competition blood tests in the same year. <br />Petrova crowned<br /><br />Russia’s Nadia Petrova thrashed top-seeded Dane Caroline Wozniacki 6-2, 6-1 in Sofia on Sunday to secure her maiden Tournament of Champions trophy and a 13th career title. <br />It was the 30-year-old’s third tournament victory of the year after winning a Wimbledon warm-up event in Den Bosch, Netherlands and the Pan Pacific Open in Tokyo in September. <br /><br />“It’s a great way to finish the season,” Petrova said after receiving the trophy. <br />Winning the season-ending WTA event at the Armeets Arena in Sofia earned second seed Petrova a cheque for $270,000 and helped her rise one place in the world rankings to 12th. <br /><br />Wozniacki began 2012 as the world number one but endured a mediocre season and had to wait until September to land her first trophy of the year at the Korea Open. <br />The Dane then won the Kremlin Cup in October. <br /></p>