Athletics doping crisis: Russia has 'serious problem'

The former director general of Russia's anti-doping agency has admitted the country has "a serious problem", and says 40% of its drug-test violations have come in youth sports. Russia was suspended from international athletics over doping, and must reform in order to return for the Olympics. On Thursday, four Russian weightlifters were suspended after failing drugs tests at the World Championships. "In Russia, the doping issue is acute, we can't deny it," said Ramil Khabriev. Khabriev, who left his post at Rusada earlier this month, was speaking to Russian broadcaster R-Sport. He added: "We have the most violations in anti-doping rules in comparison with other countries. "This, of course, shows there's a serious problem. Around 40% of these violations are from youth sports, which is alarming."

Roger Federer: I have no plans to retire after Olympics

Roger Federer, the 17-time Grand Slam singles champion, does not intend to retire after next year's Olympics. The Swiss will turn 35 during the Rio Games, where he will play in the singles and mixed doubles, although he has not decided on the doubles. "I've planned all of 2016, you know all the way through the Rio Olympics and beyond," he said. "No plans to retire yet. I don't have a definite date even though that would help to make things easier to plan." Federer, who has been competing in the International Premier Tennis League in India, added: "I'm looking forward to next year. "The Australian Open is obviously a big goal for me. And after that it's going to be a long, tough year. "So I'm happy I'm feeling fine physically and in good shape and of course, like I say so many times I hope I'm still on tour for a while."

Roger Federer to partner Martina Hingis at 2016 Olympics

 Roger Federer will partner former Wimbledon champion Martina Hingis for Switzerland in the mixed doubles at the 2016 Olympics in Rio. Federer, 34, and Hingis last played mixed doubles together at the Hopman Cup in Australia in 2001. The 17-time Grand Slam champion said he is "really excited". "I looked up to her when I was younger, I thought she was the most unbelievable talent," added Federer, who is a year younger than Hingis. "She's almost my age and she was winning Grand Slams while I was still at the national tennis centre and I couldn't believe how good she was."