LONDON -- Roger Federer fought back Saturday to reach the semifinals in the ATP World Tour Finals. On the back of a poor season, the 17-time Grand Slam winner overcame a 3-0 deficit in the third set to beat Juan Martin del Potro 4-6, 7-6 (2), 7-5 to reach the semifinals for the 11th time. The Swiss earned a chance to prove that -- despite his aging legs, aching back and recent lack of consistency -- he can still beat rival Rafael Nadal, his semifinal opponent. "I just have to have the right mindset to give it one last go, maybe play with a little less pressure than I have in previous matches with him," Federer said. "I just feel like I need to look at it more as being an underdog a little bit because of circumstances, because of my year, because of his year. Maybe that free swinging is what I kind of need to do a little bit more tomorrow." The 32-year-old Federer has endured a tough year and the elite event is his last chance to win a big title in 2013. Federer has just four victories against top-10 opponents in 2013 and has not beaten Nadal since 2012. The top-ranked Spaniard leads 21-10 in their head-to-head series, but Federer is 4-0 on indoor hard courts, having secured all four wins at the ATP Finals. Nadal, who returned to tennis in February following a seven-month layoff due to a knee injury, clinched the year-end No. 1 spot this week in a season in which he won the French Open and the U.S. Open. In London, the Spaniard qualified from his group unbeaten. "We know each other that well. Hes going to do exactly what he needs to do, Im going to try to do what I need to do," Federer said. "Hopefully its going to match up good for me. If not, he deserves it. Hes had a wonderful season." Novak Djokovic, who beat Richard Gasquet 7-6 (6), 4-6, 6-3 in his final round-robin match to extend his winning streak to 20 matches since his loss to Nadal in the U.S. Open final in September, will face Stanislas Wawrinka in the other semifinal. Federer won only the grass-court event at Halle, Germany, in June. He regularly lost to unseeded opponents and secured his qualification for the Finals at the last minute. "The goal is always to win every tournament. But I think I had to be slightly more realistic in recent weeks and months," Federer said. "I knew that sometimes just getting a few rounds into the bag was positive." Both Federer and del Potro needed a win to progress from Group B and treated the crowd to a tense and entertaining back-and-forth match. Federer trailed in all three sets. Only once in 12 appearances has Federer failed to advance to the last four at the season-ending tournament for the top eight players. He struggled to return del Potros big serve in the first set and committed seven forehand mistakes as his rival opened up a 5-1 lead. Capitalizing on more Federer errors, del Potro broke again in the third game of the second set. The Argentine looked set for an easy win but failed to build on the momentum, double-faulting as Federer levelled at 3-3. Federer then gradually took the upper hand with a brilliant display at the net and played a nearly prefect tiebreaker as del Potro crumbled. Federer clinched the set with an ace. But Federer again started sluggishly in the decider, allowing del Potro to break as he hit two consecutive weak forehands. But the blip was temporary and, once again, his rival could not take advantage of his inconsistency. At 3-1, del Potro saved a break point but fluffed a forehand on the second one, bringing Federer back into the match. Hitting more confidently toward the end, Federer broke to go up 6-5 and saved a break point in the next game before closing out the match with his 10th ace. "I think I got two chances to win the match," del Potro said. "But in the end you have to be focused and to find the winners. I made the mistakes, and he was there really focused to take the chance." The mark of the champions. Custom Texas Rangers Jerseys . PETERSBURG, Florida – Its been almost seven years since the Blue Jays last won a series at Tropicana Field. Texas Rangers Jerseys . -- At the beginning of training camp, Andrew Bogut set a goal to play all 82 regular-season games and regain his place among the NBAs best centres. http://www.texasrangersshop.com/rangers-nolan-ryan-jersey/. The 17-time Grand Slam champion, who lose three straight finals in Monte Carlo to Rafael Nadal from 2006-08, has not played in the tournament since 2011, when he lost to Jurgen Melzer in the quarterfinals. Ferguson Jenkins Jersey . -- Chris Tillman paid no attention to the Baltimore bullpen as it started to stir in the ninth inning. Rougned Odor Jersey .C. -- Martin Kaymer set a U.PHILADELPHIA -- That high-octane, ball-control offence belonged to the San Diego Chargers. Philip Rivers threw three touchdown passes to Eddie Royal, and Nick Novak kicked a 46-yard field goal with 7 seconds left to lead the Chargers past the Philadelphia Eagles 33-30 on Sunday, spoiling Chip Kellys home debut. On Phillys turf, the Chargers (1-1) looked more like the Eagles ideal offence. They racked up 539 yards, held the ball for 40:17 and sped things up. "We kind of no-huddled the no-huddlers," Rivers said. "We had our own rhythm of no-huddle going. It was a heck of a team win." Michael Vick threw for a career-best 428 yards and two touchdowns and ran for a score. But a porous Eagles defence couldnt stop Rivers all day. He finished 36 of 47 for 419 yards, and the Chargers punted only once. They fumbled twice inside Philadelphias 10 in the first half. The teams combined for 1,150 total yards. The Chargers got good news after the game when they learned receiver Malcom Floyd was fine after leaving on a stretcher with a neck injury on a hard hit by DeMeco Ryans and Nate Allen on the first play from scrimmage after halftime. "All the tests right now look good, so its great for the organization to go out and get a win for Malcom," coach Mike McCoy said. Following a dynamic 33-27 victory over Washington last Monday, the Eagles (1-1) needed more time to get their up-tempo offence going against San Diego. They crammed 53 plays into the first half against the Redskins, took a 26-point lead in the third quarter and held on to beat the defending NFC East champs. But it was the Chargers who moved the ball seemingly at will in the first half. Those two turnovers were costly, however, and the Eagles had a chance to win at the end. "It was big for our offence to just convert on third down, trying to keep their fast-paced offence off the field, knowing how explosive they were," Royal said. The Eagles had a first down at the Chargers 10 before Vick was shaken up on an incomplete pass. Nick Foles came in and threw another incompletion before Vick returned and misfired on a throw. Alex Henery kicked a tying 32-yard field goal that left Rivers plenty of time to answer.dddddddddddd "It doesnt matter how we score as long as we score," Kelly said. "But I still think we left too many opportunities offensively out there." Rivers quickly led the Chargers down the field with less than two minutes left, and Novak nailed his fourth field goal to win it. "Last week, we didnt finish the game," McCoy said about blowing a 21-point lead in a 31-28 loss to Houston. "We made too many mistakes. Today, we finished." The Eagles took a 27-23 lead when Vick ran in from the 2, but the defence couldnt hold it. Henery allowed the ball to slip through his hands when Fozzy Whittaker fumbled on the kick return and the Chargers started at the Eagles 39. A few plays later, Rivers tossed a 15-yard TD pass to Royal for a 30-27 lead. DeSean Jackson had 193 yards receiving, including a 61-yard TD, for the Eagles. LeSean McCoy had a career-high 114 yards receiving. "We made our share of plays today and I think were going to get better," Vick said. Antonio Gates led the Chargers with 124 yards receiving, Floyd had 102 and Royal added 90. Rivers found Royal wide open on a third-and-10 for a 24-yard TD pass for a 20-10 lead, but the Eagles got a field goal then tied it when Vick hit Jackson in stride on a deep ball. Vick tossed a 13-yard TD pass to Riley Cooper to cut San Diegos lead to 13-10 in the second quarter. Then the Chargers wasted two excellent opportunities on consecutive drives. Brandon Boykin forced Gates to fumble after a catch, and Casey Matthews recovered at the Eagles 2. The Chargers were at the Eagles 8 on their next possession before Trent Cole forced Ryan Mathews to fumble and Mychal Kendricks recovered. Vick quickly moved the Eagles into field-goal range, but Henery missed a 46-yarder wide right at the end of the half. NOTES: Royal has five TDs on 10 catches in two games. ... Chargers rookie LB Manti Teo didnt play because of a sprained right foot that he injured in a preseason game Aug. 8. ... Eagles starting CB Bradley Fletcher was sidelined because of a concussion. Cheap Buffalo Sabres GearWholesale Calgary Flames JerseysCheap Adidas Colorado Avalanche JerseysMontreal Canadiens Outlet StoreWholesale New Jersey Devils JerseysAdidas Arizona Coyotes JerseysCheap Adidas Boston Bruins JerseysCheap Adidas Carolina Hurricanes JerseysChicago Blackhawks Shop Free ShippingWholesale Columbus Blue Jackets JerseysDallas Stars Shop Free ShippingCheap Adidas Detroit Red Wings JerseysAnaheim Ducks Jerseys ChinaWholesale Edmonton Oilers JerseysFlorida Panthers Shop Free ShippingWholesale Los Angeles Kings JerseysMinnesota Wild Outlet StoreCheap Adidas Nashville Predators JerseysCheap Adidas New York Islanders JerseysNew York Rangers Winter Classic JerseysCheap Adidas Ottawa Senators JerseysCheap Adidas Philadelphia Flyers JerseysWholesale Pittsburgh Penguins JerseysCheap Adidas San Jose Sharks JerseysSt. Louis Blues Winter Classic JerseysWholesale Tampa Bay Lightning JerseysToronto Maple Leafs Outlet StoreVancouver Canucks Outlet StoreCheap Adidas Vegas Golden Knights JerseysCheap Adidas Washington Capitals JerseysCheap Adidas Winnipeg Jets Jerseys ' ' '