England prop Corbisiero to have knee surgery

England and Northampton prop Alex Corbisiero will undergo knee surgery on Tuesday and is doubtful for the Six Nations tournament starting in February. "Six Nations is a very long way off for him, I think his focus is on getting himself fit and back in the Northampton squad," Northampton's director of rugby Jim Mallinder told reporters on Saturday. The surgeon is pretty positive he can sort him out, so he will go under the knife and hopefully he'll be back sooner rather than later." Corbisiero, 2