World number two Rafael Nadal said on Tuesday that the doping testing procedures were too tough on the players.

"I am the first who wants a clean sport, more than anyone, believe me, but the way it (controls) are being done is, in my opinion, not right," the Spaniard, competing at the ongoing Paris Masters, told a press conference.

"Sure, I would love to have a few changes," he said. "I think that's too much to have to say every day of your life where you are".

The WTA, the women's governing body, said it would like to see the World Anti-Doping Agency (WADA) revise its 'whereabouts' rule to give players more flexibility when they are competing.

Belgian players Yanina Wickmayer and Xavier Malisse were both handed one-year suspensions last week for failing to notify their national doping agency where they could be reached, under a ruling the WTA believes is a little too stringent.

The debate about doping in tennis was also stirred by Andre Agassi's recent admission that he had lied about using drugs.