_____ tennis player recently won the second Wimbledon title by defeating Roger Federer ?

a)  Rafael Nadal
b)  Novak Djokovic
c)  Andy Murray
d)  Stan Wawrinka

Djokovic defeated Federer 7-6 (7/5), 1-6, 7-6 (7/4), 4-6, 13-12 (7/3) in the longest ever final and settled by an historic tie-break. Djokovic’s victory extends to 11 successive Grand Slams won by the big three, himself, Federer and Rafael Nadal.