Miami: Roger Federer´s latest reign atop the world rankings will end after the Swiss great´s shock loss to Australian qualifier Thanasi Kokkinakis in the second round of the Miami Masters on Saturday.
Kokkinakis, ranked 175th in the world, needed a wild card just to get into qualifying. But he showed nerves of steel in a 3-6, 6-3, 7-6 (7/4) triumph over 20-time Grand Slam champion Federer.
Federer, who regained the number one spot in February after winning the title in Rotterdam, needed to reach the quarter-finals to remain at the summit.
Instead he´ll be replaced by Rafael Nadal when the rankings are released at the end of the tournament.