NEW YORK - Playing basketball, eating ice cream and drinking milkshakes during tennis tournaments.

Nick Kyrgios admitted he had not been dedicated in his roller coaster career after being dumped out of the US Open in the first round on Tuesday.

The mercurial 22-year-old, one of the most gifted players on the tour, lost 6-3, 1-6, 6-4, 6-1 to fellow Australian John Millman after injuring his right shoulder.