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MADRID, Spain -- David Beckham will be sidelined for at least a month of his remaining time at Real Madrid after damaging the lateral ligament in his right knee.
A spokesman for Beckham said the former England captain would be out for between four and six weeks after suffering a strain to the ligament during Sunday's 1-1 draw against Getafe at the Bernabeu.
Beckham misses Wednesday's return leg of the Champions League last-16 tie against Bayern Munich in Germany; Saturday's clash against arch-rivals Barcelona at the Nou Camp and at least another four Primera Liga games.
If Real manage to beat Bayern the 31-year-old could be available for the return leg of the Champions League quarterfinals.
England coach Steve McClaren, under pressure to recall Beckham to the national squad, had planned to watch Real's European return.
However, Beckham's injury has scuppered hopes of a return to the England fold for this month's vital European Championship tie in Israel.
Beckham is leaving Real at the end of the season after agreeing to sign a five-year-deal with MLS side LA Galaxy worth $250 million.
Real defender Fabio Cannavaro has said his team are certain to be knocked out of the Champions League if they limit themselves to defending their first-leg advantage on Wednesday.
"We have to score a goal against them," the Italy captain told sports daily Marca on Tuesday. "If we sit back we are dead. Instead we've got to go for that goal and I wouldn't rule out the chance of us winning the match."
Real roared into a 3-1 halftime lead against Bayern in the first leg at the Bernabeu, but a late strike from Dutch midfielder Mark van Bommel threw the tie wide open once again.
The nine-times European champions need only a draw to progress to the quarterfinals, but their record in Munich is poor having lost seven of their previous eight encounters there and drawn just one.
But Cannavaro, who led Italy to triumph in the World Cup in Germany last year, believes the Spaniards can come away with a victory.
"Why can't we win in Munich? We have already shown that we are a team that wins a lot of games away from home," he said.
"It is in games like this when you see the true personality of the team. If we try and wait, let the clock run down and keep the score at 0-0 then we will go out. We have to have a winning mentality, be brave and go out there to win."
Real, who eliminated Bayern on their way to winning the Champions League in both 2000 and 2002, are also without Spain winger Jose Antonio Reyes who also strained knee ligaments on Sunday.
Beckham had been in fine form for Real Madrid after being reinstated to the side.