Kristoff wins in Qatar

DOHA — Norwegian Alexander Kristoff sprinted to the fourth stage victory in the Tour of Qatar Thursday, as his compatriot Edvald Boasson Hagen lost the overall leader's gold jersey to Mark Cavendish. Kristoff added to Tuesday's second stage win by pipping his Katusha teammate Jacopo Guarnieri and Belgian Greg van Avermaet to the line. The 28-year-old, who won three stages and the points classification in Qatar last year, is now fourth and just nine seconds behind overall leader Cavendish. Cavendish finished fifth to retake the lead he lost to his Dimension Data teammate Boasson Hagen Wednesday. Boasson Hagen won the third stage, but he suffered a puncture on this 189-kilometer ride and lost 45 seconds to Cavendish. The Briton takes a slender two-second lead over van Avermaet into Friday's fifth and final stage to Doha, as he looks to regain the gold jersey that he first won in 2013. Former doper mentoring UK cyclists British Cycling's best young road prospects are being mentored by David Millar, the former professional rider who was once banned for anti-doping violations, the governing body said Thursday. In a statement it said Millar, who retired from riding in 2014, was working on a voluntary basis with the men's endurance academy program in Italy. Millar, 39, was banned in 2004 after admitting using the blood-booster EPO but returned to become one of the sport's biggest campaigners against performance enhancing drugs. Shane Sutton, British Cycling technical director, said Millar, the first Briton to wear the leader's jersey in all three main Tours, was perfectly placed to help a new generation looking to emulate the feats of Tour de France winners Bradley Wiggins and Chris Froome. "Nurturing an anti-doping culture is at the heart of everything we do at British Cycling and educating our young riders on the subject is a responsibility we take seriously," he said in a statement. "Having someone of David's caliber on board to support us in this education process is invaluable; he is readily available to share his well-rounded experiences as a professional cyclist to the young riders who aspire to succeed in their careers." Sutton said Scot Millar could join the team in a more official capacity.