Federer Upset by Australian Kokkinakis in Miami

Thanasi Kokkinakis of Australia (L) shakes hands with Roger Federer of Switzerland (R) after their match on day five of the Miami Open at Tennis Center at Crandon Park on Mar 24, 2018, in Key Biscayne, FL, USA. Kokkinakis won 3-6, 6-3, 7-6(4). Geoff Burke-USA TODAY Sports

World number one Roger Federer suffered a shock 3-6 6-3 7-6(4) defeat by Australian Thanasi Kokkinakis in the Miami Open second round on Saturday.

It was the second loss in six days for the Swiss, who was beaten by Juan Martin del Potro in the Indian Wells final and is set to lose his top ranking to Rafa Nadal even though the Spaniard is not playing in Miami.