Kim Clijsters had to give six tests before the ITF approved her comeback to the turneringstennis.

In the last week did the former verdensetter Kim Clijsters comeback after more than seven years as a self-tennispensionist. The International tennis federation (ITF) has done its bit to ensure that it took place on a fair basis.

In september last year announced the belgian comebacket, and she has since been subject to the same measures as the other players at the top level.

It has, among other things, meant that she diligently has been tested for doping.

Official documents from the ITF shows that the 36-year-old belgian has made drug testing six times before her comeback could be approved. It writes the AFP news agency.

in terms of impact went her first match after the comebacket not go as planned. She lost 2-6, 6-7 to spaniard Garbiñe Muguruza in the first round of the Dubai Duty Free Championship last week.

this is The second time that the belgian resuming his career.

Clijsters was away from tennis for two years between 2007 and 2009. Subsequently, she made an impressive comeback. Among other things, she beat Caroline Wozniacki in the US Open final in one of his first tournaments back.

Her resume counts 41 WTA titles in singles. Four of them are picked up in the grand slam tournaments.