TOKYO -- Frank Dancevic wanted to give it his all in Canadas do-or-die singles match against Japans Kei Nishikori at the Davis Cup on Sunday. But unfortunately for the Niagara Falls, Ont., native, a pulled muscle wouldnt allow him to go past the second set. Japan sealed its victory over Canada in the first-round Davis Cup tie after Nishikori downed an ailing Dancevic 6-2, 1-0. Later Sunday, Peter Polansky of Thornhill, Ont., lost to Go Soeda in the fifth match 6-1, 6-4 to increase Japans margin to 4-1. "Kei came out playing really well today and once I pulled a stomach muscle early in the second set there was no way I could stay with him when I could only serve at 20 per cent..." Dancevic said. "Under other circumstances I probably wouldnt have even stepped on the court with the way I was feeling, but this is Davis Cup and I wanted to give it all I had and push to the limit because this situation means a lot to me." Dancevic, ranked 119th in mens singles, held his serve during the first game, but World No. 18 Nishikori went on to break twice and win the next five games to eventually take the set. After being broken to start the second set, Dancevic took a medical timeout and was forced to retire, handing the match and the tie to Japan. Canada will play a World Group playoff in September in hopes of keeping its spot in the upper echelon of the competition. Japan, meanwhile, will face the winner of a tie between the Czech Republic and the Netherlands in the Davis Cup quarter-finals. The Canadian squad was missing its top two singles players at the tournament as both No. 11 Milos Raonic of Thornhill, Ont., and No. 25 Vasek Pospisil of Vancouver were unable to recover from injuries in time to play. Polansky, who lost Canadas first singles match to Nishikori on Friday, replaced Raonic. Dancevic stepped in for Pospisil in the doubles match with Daniel Nestor on Saturday. The Canadian duo, who hadnt played together in three years, lost to Nishikori and Yasutaka Uchiyama 6-3, 7-6 (3), 4-6, 6-4. "We just battled with so many things this week and nothing really went our way when it came to injuries," said Canadian team captain Martin Laurendeau. "Its obviously disappointing but you cant blame these guys. They gave their all. "... Frank and Peter stepped in and left everything on the court every time they went out there. With what we accomplished last year (reaching the semifinal) we didnt want to take a step back like this but hopefully everyone gets healthy and has a strong season and we can fight hard to keep our spot in September." Stitched China Jerseys . Unlike last year when nobody got in, there have been estimates of as many as five getting voted in this time around and as few as one, Greg Maddux. China Jerseys Cheap . 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He was injured when he slid hard into the boards in the second period of a 2-1 shootout loss to Chicago on Friday.SAN DIEGO - Philip Rivers gingerly eased himself onto the stool at his locker, clearly sore after injuring his leg and then having the wind knocked out of him.While beat up, at least Rivers and the San Diego Chargers werent beaten as they had been in their previous three games.Rivers threw a 22-yard touchdown pass to Malcom Floyd on the games third play from scrimmage, and the Chargers held on for a lacklustre 13-6 victory against winless Oakland on Sunday, extending the Raiders losing streak to 16.The Chargers (6-4) snapped a three-game skid and welcomed back Ryan Mathews, Manti Teo and Melvin Ingram, who had been out since September.Oakland played well today, and it probably wasnt our best offensive day, but they had a lot to do with it, Rivers said.We found a way to win, and that is what its all about.The losing streak by the Raiders (0-10) is the equivalent of a full season. Monday is the one-year anniversary of their last win, 28-23 at Houston.Rivers was hurt after a 28-yard completion to Floyd was negated by a holding call against left tackle King Dunlap midway through the third quarter. The Chargers had to settle for Nick Novaks 52-yard field goal that made it 13-3.He had the wind knocked out of him in the fourth quarter and was walking gingerly on the sideline as backup Kellen Clemens warmed up.I will be fine, Rivers said.He went back in after Sebastian Janikowski kicked a 25-yard field goal to pull the Raiders within a touchdown with four minutes to play.The Chargers were coming off their bye, which was preceded by a 37-0 loss at Miami on Nov. 2, their worst in 18 seasons.Rivers was 22 of 34 for 193 yards.I didnt throw it as good as I need to throw it, but they covered us some — credit to them, he said. A lot of times there wasnt a lot there.The Chargers came up with a huge play on third-and-3 after the Raiders closed within a touchdown when tight end Antonio Gates tipped a pass to himself between safeties Charles Woodson and Brandian Ross for a 15-yard gain to the Oakland 45.Awesome catch,, Rivers said.dddddddddddd I think I should have thrown it to him sooner.Woodson was in position to break it up or intercept it.Thats a play I should have made, Woodson said. I felt I let the team down. I dont know how many times I caught balls like that. ... Thats how the seasons going. Its been that close a lot of times.Oakland got to the San Diego 7 with 4:10 left, but the drive stalled and Janikowski kicked his 25-yarder.A desperation pass by Raiders rookie Derek Carr fell incomplete short of the end zone as time expired.Carr was 16 of 34 for 172 yards.Obviously there is a lot of anger, Carr said. Obviously there is a lot of disappointment. But no ones giving up; no one is going to give up.Novak extended his franchise-record streak to 32 consecutive field goals by making a 23-yarder late in the second quarter. He then pushed a 48-yard attempt wide left as the half ended.Carr fumbled on the games first play from scrimmage when he mishandled a shotgun snap, and San Diego linebacker Donald Butler recovered at the 22. Two plays later, Floyd leaped to catch a touchdown pass over T.J. Carrie.Carr almost led the Raiders to an upset of the Chargers on Oct. 12 but was intercepted with 1:13 to play to preserve San Diegos 31-28 victory.The Raiders crossed the 50-yard line only twice Sunday. They got to the San Diego 23 on their third drive before settling for Janikowskis 42-yard field goal.NOTES: Each team punted nine times. ... Raiders first-round draft pick Khalil Mack had his first career sack. ... Mathews had 70 yards on 16 carries. He limped out of the locker room, his right knee heavily wrapped. It was his first game back since spraining the knee in a win against Seattle on Sept. 14. ... Chargers rookie Jerry Attaochu, also returning from an injury, had a sack. ... Chargers C Rich Orhnberger (ankle) and NT Ryan Carrethers (elbow) left and didnt return.___Follow Bernie Wilson on Twitter at http://twitter.com/berniewilson___Online: http://pro32.ap.org/poll and http://twitter.com/AP_NFL ' ' '