Japanese star Kei Nishikori pulled out of the Australian Open and the inaugural ATP Cup Monday as he continues to struggle with an elbow injury that has kept him out since the US Open.

Tennis: Japan's Nishikori out of Australian Open and ATP Cup

A stunned Kei Nishikori was sent packing from the Miami Open after the Japanese world number six suffered a 2-6, 6-2, 6-3 second-round loss to Serbian Dusan Lajovic on Friday.

Miami Open: Kei Nishikori stunned by Lajovic in second round

The Japanese fifth seed, who is on his way back from a five-month injury layoff, recovered from dropping the opening set to defeat Albot 4-6, 6-3, 6-1 in Long Island

Tennis: Nishikori into last four at New York Open

The world number one paid tributes to those who were killed in London and Manchester attacks recently right after he won his fourth-round match against Karen Khachanov

French Open: Emotional Murray to take on Nishikori in quarters

France?s 11th seeded Lucas Pouille was the other big casualty after he lost to Donald Young

Miami Masters: Nadal, Nishikori through to next round; Dimitrov loses

Japan's fourth-seeded Nishikori erased a 4-1 second-set deficit to put away American Donald Young 6-2, 6-4

With Nadal, Federer, Djokovic in wings, Nishikori advances into Indian Wells quarter-finals

Two-time Grand Slam winner Wawrinka asserted himself in the later stages, withstanding onslaught from sixth-seeded Nishikori

Tennis: Wawrinka beats Nishikori, faces Djokovic in US Open final

Serena's 308th victory meant she crossed Roger Federer in the all-time list of grand slam wins among both men and women

US Open: Serena Williams beats Shvedova in record grand slam win

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