Argentina's Mariano Puerta said on Wednesday there is no truth in a report in a French newspaper that he had taken a banned drug and tested positive at the French Open [ Images ].

"I'm really angry, I've started investigations with my lawyers. This is a very delicate subject, there's no truth in it," said Puerta, the losing finalist at Roland Garros [ Images ] in June.

"It's news to me," Puerta said by telephone from Tokyo. "It's strange because nobody from the ATP or ITF has called me."

Traces of a stimulant called etilefrine were found in a urine sample from Puerta taken after his final defeat by Spain's Rafael Nadal [ Images ] in June, the French sports newspaper L'Equipe said on Wednesday.

"The newspapers can say anything without proof. I haven't taken anything I shouldn't," Puerta said. "If there's an Argentine who was positive let them find him," he said.

"After the [previous] positive I've got to be very careful, I can't even take an orange juice."

Puerta was suspended for nine months after testing positive for banned substance clenbuterol in 2003. He faces a life ban if found guilty of another doping offence.