Tennis star Rafael Nadal's recovery from back injury is worth considering as a variable in his effort to continue making history.
Nadal said that he is certain that it is nothing serious, as he is feeling the same as he has felt at other times, only with a bit more aggression, News24 reports.
The ailing world number one lost to Swiss Stanislas Wawrinka in the Australian Open final on Sunday following a major muscle spasm in his back early in the second set, preventing the Spaniard drawing level on 14 major singles titles with American Pete Sampras.
