PARIS - Rafael Nadals back is giving him more trouble than his opponents so far at the French Open. Linval Joseph Jersey . After pushing his winning streak at Roland Garros to 31 matches with a 6-2, 7-5, 6-2 victory over 65th-ranked Leonardo Mayer of Argentina in the third round Saturday, eight-time champion Nadal said his bothersome back is forcing him to cut back on the velocity of his serves. Nadals back also acted up in January during his loss to Stan Wawrinka in the Australian Open final. "During my career, I had (a) few problems. ... Hopefully will not be (the) case" the rest of the way in Paris, the No. 1-ranked Nadal said. "I served more slowly since I started feeling the pain," he said, noting that hes worn tape on his back for extra support. Against Mayer, Nadal averaged only 102 mph (165 kph) on first serves, with a top speed of 114 mph (184 kph). That was down from an average of 111 mph (179 kph) and top of 122 mph (197 kph) in the first round against Robby Ginepri last Monday. Through six sets across his first two matches, Nadal faced only five break points and lost serve only twice. He needed to deal with eight break points against Mayer, losing two. Still, Nadal made only 10 unforced errors all match — two in the first set, three in the second, five in the third — and equaled his longest run at Roland Garros. But the last time Nadal won 31 in a row in Paris, he failed to get No. 32, losing in the fourth round in 2009 to Robin Soderling. That remains the Spaniards only defeat in 63 matches at the tournament. Nadal has dropped 19 games heading into his match against 83rd-ranked Dusan Lajovic of Serbia, who is in the second major of his career and beat Jack Sock of the United States 6-4, 7-5, 6-3. Another American, Donald Young, lost in five sets to Guillermo Garcia-Lopez of Spain, leaving No. 10 John Isner as the last U.S. man in the field. Before this French Open, the 23-year-old Lajovic had a 10-21 career record in tour-level matches, never winning two in a row. "I saw him play a few times on TV. Sure, its great to have new players on tour, young players on the tour that are coming strong. Hopefully not too strong," Nadal said with a smile. "Well see on Monday. I hope to be ready." Asked whether he would seek advice from another Serbian, No. 2 Novak Djokovic, before facing Nadal, Lajovic joked: "Yeah, I will try to ask everybody (for) some tips." That wont help if Nadal produces shots of the sort he did when Mayer served at 5-all in the second set — a stretching, scooping backhand lob to break. As Mayer watched the shot sail overhead, he waved his left hand to signal to the ball to go out, then rolled his eyes when it curled in. At the other end, Nadal pumped his fist, ahead 6-5 and well on his way to reaching the fourth round for the 10th time in 10 trips to Roland Garros. Roger Federer is the only other man to make it to the final 16 in Paris that many years in a row. The man Nadal beat in last years final, No. 5 David Ferrer, defeated No. 32 Andreas Seppi of Italy 6-2, 7-6 (2), 6-3. Ferrer now plays No. 19 Kevin Anderson of South Africa. No. 23 Gael Monfils of France put together a 5-7, 6-2, 6-4, 0-6, 6-2 win over No. 14 Fabio Fognini of Italy in a wild match that included a point penalty for Fognini when he threw his racket and it landed near a ball boy. Monfils and Fognini combined for more than twice as many unforced errors, 137, as winners, 66. Earlier Saturday, No. 15 Sloane Stephens moved into the fourth round for the sixth major in a row. The American now meets No. 4 Simona Halep of Romania. Other fourth-round matchups: 2009 champion Svetlana Kuznetsova against No. 23 Lucie Safavora; 2012 runner-up Sara Errani against No. 6 Jelena Jankovic; No. 28 Andrea Petkovic against 148th-ranked qualifier Kiki Bertens of the Netherlands. As the sun came out and the temperature topped 70 degrees (20 Celsius) after several days of overcast skies and occasional rain, Stephens eliminated No. 22 Ekaterina Makarova of Russia 6-3, 6-4, while Halep beat 55th-ranked Maria-Teresa Torro-Flor of Spain 6-3, 6-0. Halep is the highest seeded woman left, because of losses by No. 1 Serena Williams, No. 2 Li Na and No. 3 Agnieszka Radwanska. Said Halep: "Thats a surprise for everyone." Kai Forbath Jersey . -- The Chicago Bears say they have agreed to a one-year contract with centre Roberto Garza. Alan Page Jersey .The McLaren MP4-30 was launched on Thursday, with chief executive Ron Dennis saying it marks the start of a lengthy journey back to winning grands prix and eventually world championships.McLaren, which hasnt won a grand prix since 2012, will be using Honda engines for the first time since 1992, and has signed two-time world champion Fernando Alonso to partner Jenson Button for the upcoming season. http://www.vikingsnflfansclub.net/Black-Friday-Brett-Favre-Jersey/ .Hoffenheim forward Anthony Modeste opened the scoring on a counterattack in the 15th minute, shooting though Jaroslav Drobnys legs after Lewis Holtby lost the ball in midfield.The Triple Crown is made up of three races in three states that use three different sets of drug rules. A lawmaker is hoping the buzz from California Chromes run for the Triple Crown might build support for a bill that would place the U.S. Anti-Doping Agency in charge of drug testing at races nationwide. "Its an industry that has, for years, pledged to clean things up," said Rep. Joe Pitts of Pennsylvania, who sponsored the Horseracing Integrity and Safety Act. "But things seem to be getting worse, not better." Pitts introduced the bill last spring, and since then, it has been in committees awaiting a chance to be voted on by the full House. Drug use is widely seen as the biggest problem facing horse racing today. A recent investigation by People for the Ethical Treatment of Animals sparked an investigation into successful trainer Steve Asmussen for allegedly mistreating horses. A 2012 investigation by The New York Times found that 3,800 horses had tested positive for drugs, the large majority of which were for illegal levels of prescription drugs. Some critics of the current rules point out that the 38 states that operate horse tracks work under 38 distinct sets of rules. The National Thoroughbred Racing Association has adopted a set of uniform rules and is pushing state legislatures, racing commissions and other regulatory bodies to pass them in the individual states. So far, 19 states have passed or are considering a rule that would remove all controlled substances except for Lasix -- a diuretic known to improve horses performance -- from racing, and standardize testing for the other drugs. Eight states havve passed another rule that standardizes a penalty structure for trainers who violate drug rules. Teddy Bridgewater Jersey. Horse racing is highly regulated by the states because it involves gambling. NTRA president Alex Waldrop says he hasnt spent much time analyzing the proposed national legislation, but the reality is that its very hard to pull rulemaking away from the states. "Its a very difficult balance were trying to strike here," Waldrop said. "Its about respecting every states interest and unique concerns. But were constantly pushing for greater uniformity through education and scientific research." The clumsy nature of the issue came into focus shortly after the Preakness, when California Chromes trainer had to get a waiver from track stewards at the Belmont to wear nasal strips, which were allowed in Kentucky and Maryland but not in New York. Though the nasal-strip issue turned out to be minor, USADA CEO Travis Tygart said those sorts of rules differences put horse racing in much the same position Olympic sports were in before they went for more standardized enforcement after the scandals of the 1990s. "The lack of uniformity and strict enforcement has created huge loopholes, where, if youre playing by the rules, youre at a competitive disadvantage," Tygart said. Dionne Benson, who helped write the uniform rules being proposed by the NTRA, said improving anti-doping measures will involve more than one national law. "Its not as easy as enacting a bill," she said. 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