Bayern Munich winger Franck Ribery could miss France's decisive two-legged World Cup qualifier with Ireland next month due to a nagging knee injury. The 25-year-old's start to the season has been hampered by the injury setback, which forced him to miss most of Bayern's campaign so far. "We have decided to allow the injury to heal. This could last up to a month," Bayern Munich coach Louis van Gaal said Wednesday's 2-1 defeat to Bordeaux. France clash with Ireland over two legs on November 14th and 18th. Unbelievable Meanwhile, Van Gaal was astonished that his side performed better with a man down, following the sending off of Thomas Muller in the 30th minute. "Strange how we played much better in the second half with ten men than we did with eleven before then," said the Dutchman. "We could have made it 2-2, but it didn't want to go in. It's unbelievable. But it's also unbelievable that we gave the ball away so often in the first half."