MANCHESTER, England - Manchester United striker Robin van Persie will miss up to six weeks with a left knee injury, ruling the Netherlands striker out of both legs of a Champions League quarterfinal against Bayern Munich and potentially six Premier League games. It is a major blow to Uniteds hopes of winning the Champions League, which realistically is the clubs only route back into Europes top competition next season. Following a second scan on the injury on Friday, United said Van Persie has a "sprained knee which will keep him out for around 4-6 weeks." He appears to be in no danger of missing the World Cup finals in Brazil beginning in mid-June — the worst-case scenario according to Uniteds diagnosis is that Van Persie is out until the start of May, leaving him available for the last two or three league games in Uniteds season. Van Persie, who has scored 23 goals in 29 games for club and country this season, was carried off on a stretcher after hurting his knee in a challenge from behind toward the end of Wednesdays 3-0 victory over Olympiakos, in which he scored a hat trick to send his team into the last eight. United is seventh in the Premier League after its humiliating 3-0 loss to Liverpool last weekend, 12 points adrift of fourth-place Manchester City having played two more games. A finish in the top six would qualify United for next seasons Europa League, and sixth-place Everton is three points ahead with a game in hand. It will be a second significant spell on the sidelines for Van Persie this season — he played just two games across 2 1/2 months over the turn of the year because of groin then thigh problems. The news punctures some of the optimism that has spread through Old Trafford after the victory over Olympiakos, which came just as the pressure was beginning to build on manager David Moyes. 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The 28-year-old joins Scottish striker Kenny Miller and Argentine midfielder Matias Laba as designated players on the Whitecaps roster.CHARLOTTE, N.C. - Thomas Davis remembers the feeling in his stomach the previous time the Carolina Panthers hosted a playoff game against the Arizona Cardinals.Its something I dont want to relive, the Panthers 10-year veteran outside linebacker said Tuesday.Nor do Panthers fans.Six seasons ago the Cardinals, a 10-point underdog and a team that had shown little ability to win a game east of the Mississippi River, came into Charlotte and clobbered the NFC South champion Panthers 33-13. Carolina entered the game with a 12-4 record, but Arizona forced six Jake Delhomme turnovers.It was tough to lose that game — especially to lose that game the way we did, said Davis, one of six holdovers from that 2008 team.On Saturday, the Panthers (7-8-1) are seeking to get even when they host the Cardinals (11-5) in a wild-card game.Its been six years but Im still mad about this game (and motivated by it). running back DeAngelo Williams tweeted this week, posting a highlight video of the game with a picture of the score.Added fellow running back Jonathan Stewart: I remember how well things were going throughout the season and then you get to the playoffs and you stink it up.The loss marked a turning point in Panthers history.It not only ended Carolinas bid to reach the Super Bowl for the first time since 2003, but also sent the organization into a spiral.Things began to crumble.Delhomme was released one year later, general manager Marty Hurney and coach John Fox were let go the year after that, and the Panthers would go 23-41 over the next four seasons.Carolina didnt return to the post-season until last year, falling to San Francisco 23-10 in the divisional playoffs.We went into a drought, Davis said. We dont want that to happen again. We have back-tto-back playoff years going and we want to build off that.ddddddddddddCentre Ryan Kalil said there are lessons to be learned from that defeat — namely that anything can happen in the post-season regardless of your record.The Panthers are in just such a situation to use that as motivation.Carolina is only the second NFL team to qualify for the post-season with a losing record in a non-strike-shortened season. The other is the 2010 Seattle Seahawks, who went 7-9 but won a home playoff game over New Orleans.There are a lot of good teams in the NFL, Kalil said. There are a lot of teams that dont have a great records — but that doesnt mean theyre bad teams. It just means other teams have been a little better than them. Anybody can beat anybody, and you better believe that.Said Stewart: It tells you that no matter what you do during the regular season, it just doesnt matter. Things amp up to a whole different notch in the playoffs.For the 31-year-old Davis, the four-year run with a playoff appearance is a reminder for him to leave everything he has on the field Saturday, because he doesnt know when hell be back in the post-season.If we have another drought like that I may never get to go to the playoffs again, he said.The mood this week at the teams facility has been relaxed and loose.Coach Ron Rivera stood behind a podium on Tuesday and said he feels as if the Panthers are playing with house money after winning their final four games to get into the post-season when it appeared their season was over after a 3-8-1 start.But the Panthers are now playing with confidence.We have a lot of momentum right now and were just going to continue to ride that, Davis said.___AP NFL website: www.pro32.ap.org and www.twitter.com/AP_NFL ' ' '