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. “I was calmer than I thought,” Kokkinakis said of the third-set tiebreaker. “Inside I was pretty happy, I was excited, but I kept pretty calm.”

Federer, who won his 20th Grand Slam crown at the Australian Open, regained the number one spot in February after winning the ATP title in Rotterdam but needed to reach the quarter-finals to remain at the summit.

Instead he’ll be replaced by Spain’s Rafael Nadal when the rankings are released at the end of the tournament. “I deserve it after this match. That’s how I feel. Just so bad,” said Federer, adding that he “could never get to any level that I was happy with today”.

“Sometimes you have these matches,” he said. “Sometimes you find a way through. I just couldn’t get it done today.”

The 36-year-old wasted no time in announcing he’ll skip the clay-court season, including the French Open, just as he did last year after winning titles in Indian Wells and Miami.

The 21-year-old Kokkinakis, who has already battled injuries in his young career, became the lowest-ranked player to beat a world number one since Spain’s Francisco Clavet was 178th when he upset top-ranked Lleyton Hewitt in the second round at Miami in 2003.

Federer appeared firmly in control when he breezed through the first set without facing a break point, dropping just six points on his own serve. His lone break for a 3-1 lead was all he needed to pocket the set.

But after saving break points in the opening game of the second, Kokkinakis seized upon a lackluster service game from Federer to break for a 3-1 lead, holding firm on his own serve to force the decider.

“I feel like it already started beginning of the second set when I had break points first game, and he almost wanted to give me that game, and I couldn’t take it,” Federer said. “From that moment on, I played maybe a bad 10 minutes, which cost me the second set, maybe the match.”

Kokkinakis admitted he “didn’t really put any pressure” on Federer in the opening set. “In the second set I kind of used a couple of loose errors – I started getting in the rallies more and dictating a bit with my forehand.”

Federer was again impenetrable on his serve in the third, but he was unable to capitalize on his only two break points, both in a marathon sixth game, as they went on serve to the tiebreaker.

Two errors from Federer gave Kokkinakis a 4-3 lead. A stinging forehand winner put the young Aussie up 6-4, and he closed it out when Federer netted a backhand service return. “When I feel like I’m playing on my terms I don’t think there’s too many people that can go with me Kokkinakis said. “I just needed to play my game and play aggressive tennis.”

Federer to skip clay court season again

Federer won’t go for a 21st Grand Slam title at the French Open, with the 36-year-old Swiss great stating that he’ll skip the clay-court season. Federer confirmed the plan after crashing to a defeat against Kokkinakis. “I decided not to play the clay season,” said Federer.

It’s the second straight year that Federer will forego a clay-court campaign. Last year after winning back-to-back tournaments at Indian Wells and Miami he took a break, returning in mid-June at the grass court tournament in Stuttgart. He lost his first match there, but went on to win at Halle and Wimbledon.

(With inputs from AFP)