Rafa, as he is popularly known got the injury during his quarter final loss to compatriot David Ferrer in the Australian Open 2011.
The Spaniard who failed in Australia in his quest for the 'Rafa Slam' i.e. to hold all four Grand Slams at the same time, is expected to be fit for Spain's Davis Cup match against Belgium on March 4-6.
Currently he is recovering, from the injury at his residence in Mallorca, Spain.
In a statement on his personal website, he said, "Doctors estimate a recovery period of about 10 days from today, Feb. 1."