No drugs have been detected after medical tests on the body of the promising French tennis player Mathieu Montcourt, who died this week at the age of 24.
Preliminary results of the autopsy showed that Montcourt suffered a heart attack but further biological tests were carried out.
Montcourt was found outside his flat near Paris midweek.
The player, ranked 119th in the ATP world rankings, had just begun a five-week ban for gambling on other players' matches.
He was cleared of influencing the outcome of any of them although he was also fined for the offence.