RIO DE JANEIRO -- Juan Martin del Potro ended Rafael Nadals bid for an unprecedented second Olympic singles gold medal in a thrill-a-minute semifinal, then celebrated as if the title were already his, kneeling to kiss the court before leaping into the stands.Del Potro, who earned a bronze for Argentina four years ago, will add a silver or gold to that after advancing to the Rio de Janeiro Games final by coming back to stun 2008 champion Nadal 5-7, 6-4, 7-6 (5) in more than 3 hours Saturday.Both of us, Nadal said, played a very high level.Using the same ferocious forehands that carried him past No. 1 Novak Djokovic in the first round a week ago, 2009 U.S. Open champion del Potro now will try to pull off a third surprise on Sunday, when he meets defending champion Andy Murray in the best-of-five-set final.It means something very, very big in my career. It would be the same as the U.S. Open. Maybe even better, said del Potro, whos fallen to 141st in the rankings after three operations on his left wrist, which he uses for a two-handed backhand.I didnt expect to reach the final, beating Djokovic and Rafa, del Potro said, but I did, and I get a medal, and its amazing for me.The No. 2-seeded Murray earned a gold in singles and a silver in mixed doubles for Britain at the 2012 London Games.Hes the favorite for sure, del Potro said. Hopefully I can run like I did today.No tennis player has won two Olympic singles golds, let alone two in a row, as Murray is attempting to achieve.It would mean a lot, obviously, Murray said after beating fourth-seeded Kei Nishikori of Japan 6-1, 6-4 to stretch his winning streak to a career-high-tying 17 matches. Its obviously not an easy thing to do. Thats why its not been done before.Standing in Murrays way now will be del Potro, whose wrist problems forced him to miss 2+ years worth of Grand Slam tournaments.He showed signs of his resurgence by beating two-time major title winner Stan Wawrinka at Wimbledon in June, then used all of his 6-foot-6 frame to produce intimidating forehand after forehand that Djokovic couldnt fend off. That same formula worked against Nadal, with 18 of del Potros 19 groundstroke winners coming off his preferred wing.Its been a tough road for del Potro, who got down on his back, spread-eagle, near the Olympic logo in the main stadium after the semifinal ended with Nadal sailing a forehand wide. Moments later, del Potro planted a smooch on the dot atop the middle letter of Rio near the five rings.And to complete his rejoicing, del Potro jumped into the front row for a group hug with some of the thousands of flag-waving, name-chanting fans who rooted so vociferously for their man.With their blue-and-white flags and national soccer team jerseys, the Argentines in the crowd supported him with choruses of Ole, ole, ole, ole! del Po! del Po! -- often drawing boos or shushes from Nadals backers. The Spaniards chimed in, too, shouting Na-dal! Na-dal!All the cacophany created occasional delays between points, prompting chair umpire James Keothavong to ask for quiet.Nadal, a 14-time Grand Slam champion, earned the singles gold medal for Spain eight years ago at the Beijing Games, but sat out in 2012 because of a knee injury. He added a doubles gold on Friday, teaming with his good pal Marc Lopez. But instead of another medal of that color, he will try to go home with a bronze by beating Nishikori on Sunday -- not bad, considering Nadal missed 2+ months with an injured left wrist.Nadal got broken to trail 5-4 in the third set, allowing del Potro to serve for the match. Nadal broke right back at love, with the help of a couple of superb shots he marked with more than a half-dozen fist pumps apiece. In the next game, del Potro held three break points at love-40, but Nadal held for a 6-5 lead.In the tiebreaker, del Potro went up 5-2 with -- what else? -- a forehand winner, then earned a pair of match points with a 127 mph ace. He converted the second on a miss by Nadal, who made only six unforced errors in the first set and 25 over the last two.I gave it all I had, Nadal said, and the only thing left to do is to congratulate del Potro for his victory.The most memorable moment of Murrays straightfoward win over Nishikori came right at the end.Serving for the victory, Murray came up with a tremendous down-the-line backhand passing winner on a 23-stroke exchange, stumbling as he hit the shot and winding up sitting right there on the green court. When he realized hed won the point, he raised a fist, then stood and motioned to the crowd for more noise.That gave Murray his third match point, which he converted with a service winner. He yanked off his white hat and bellowed.Bit of a lucky shot, Murray said. I didnt even see it land, so I didnt know whether it was in or not. Thankfully, it was good.---Follow Howard Fendrich on Twitter at http://twitter.com/HowardFendrichAdidas Nmd Senza Lacci Scarpe . 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Rousey will put her perfect 8-0 record and hardware on the line against another undefeated fighter, 7-0 Sara McMann in the main event of UFC 170, which will be held at the Mandalay Bay Events Center in Las Vegas Nevada on February 22nd.Skipper Greig Laidlaw rescued a win for scrappy Scotland as he slotted over a last-gasp penalty to seal a 19-16 win over Argentina.Scotland put on an error-strewn display but did just enough to see off the Pumas at Murrayfield. There was little to separate the teams before Nicolas Sanchez scored the opening try for the visitors five minutes after half-time.But Scotland hit back with wing Sean Maitlands touchdown just four minutes later. Vern Cotters men were devastated when they allowed Australia to snatch victory with a late penalty last week but this time it was Laidlaw who was celebrating as he booted over in stoppage time.His 14-point contribution could yet prove vital for Scotlands World Cup hopes as they now climb above the South Americans to eighth place in the World Rugby rankings. The draw for Japan 2019 will be made next May and if Scotland can maintain their new position they should avoid having to take on two major nations in the opening pool phase.Scotland had won four of the last five meetings against the Pumas but their record in Edinburgh against Argentina was less impressive, having come out on top on only two of their six head-to-heads in the capital.The hosts put on a stunning light show before kick-off but that was where the fireworks ended as both sides struggled with the simplest of manoeuvres. Laidlaw slotted over a third-minute penalty after the Argentines had been caught out by Finn Russells brilliant retrieval of his own up-and-under.?But the Scots were struggling to get a foothold at the set-piece, with their 20-year-old prop Zander Fagerson - earning just his third cap - receiving a lesson in Test-level scrummaging by wily Argentine prop Lucas Noguera.The South Americans were forcing Scotland into mistakes around the breakdown - yet they were hardly putting on a spotless display themselves.Martin Landajo thought he had spotted a chink in the Scottish defence when he booted a grubber in behind but full-back Joaquin Tuculet was beaten to the loose ball by the home sides Tommy Seymour.Tempers briefly flared before Kiwi referee Ben OKeeffe restored order but Scotland found it difficult to land a telling blow. Laidlaw was guilty of throwing some pretty rotten passes while Cotter was seen thumping his desk in frustration as his line-out misfired baadly.dddddddddddd.Ross Ford temporarily replaced Brown as the hooker went off to have a head knock assessed but the veterans introduction made an immediate impact on Scotlands scrum. With the Pumas forced backwards for the first time, Laidlaw was given another simple penalty 27 minutes in.Argentina have gained themselves a reputation for swashbuckling rugby and gave a brief show of their capabilities as Matias Orlando, Juan Martin Hernandez and Santiago Cordero combined to draw their side within sight of the Scots try-line.The hosts, though, were able to scramble back into position as a brave rearguard effort held their opponents up an inch short of scoring. Sanchez did, however, nail a monster 45-yard penalty straight through the posts to half the deficit just before the break.The Pumas stand-off slotted over another kick four minutes after the restart as Scotland wandered offside. Scotland were then caught napping as Hernandez lobbed a clever cross-field kick to the left flank.Maitland failed to spot Orlandos run in behind and the Argentine centre bulldozed his way past Stuart Hogg before dotting down the opening try. Sanchez put the conversion over but the Scots made immediate amends.They swarmed over the visitors and wrestled back possession before driving up field. Huw Jones then took his side into the danger zone before popping off to Maitland, who dived over in the corner. The angle was against Laidlaw but his nerveless kick for the extras levelled up the scores.Fagerson made way for Exeters Moray Low but he could not improve Scotlands display at the scrum. An almighty heave from the visiting pack virtually trampled its way over the hosts to win a penalty which Sanchez put over to once again put his side ahead with 16 minutes remaining.Scotland turned up the pressure though and hit back with another Laidlaw penalty but Finn Russell skewed a drop-goal attempt a fraction wide. Laidlaw thought he had let victory slip through his hands when he smashed a penalty against the upright.But with the clock already showing the 80 minutes was up OKeeffe gave him one more go after spotting an Argentine infringement and this time he made no mistake. ' ' '