Haas "was not poisoned"

"It's no longer an issue," the German Tennis Federation quoted Haas as saying.

"The tests gave no results. It was too far in the past," Haas was further quoted by German media.

Alexander Waske, a doubles player in the beaten German team, was quoted in the German media earlier this month as saying an unnamed person had told him in Moscow that Haas had been poisoned.

Haas, who was beaten in straight sets on the opening day of the semi-final and was unable to play in the reverse singles because of gastro-enteritis, had tests in New York to see if there was anything to the rumour.

"I wanted to be absolutely clear about what was happening to my body," Haas added.

Haas had a minor operation on his right shoulder while in New York. The world number 12 will take six weeks off from training but expects to be fit enough to take part in the Australian Open from January 14-27 next year.