FIFA president Sepp Blatter said here that football's governing body would discuss its plans to introduce the biological passport for players with anti-doping chiefs on Thursday.

- The biological passport is what we want to do and we want to take a step ahead in the fight against doping - Blatter said on Wednesday at a debate on sports and doping.

- We are working on that. Tomorrow we will have meetings with the people from the World Anti-Doping Agency (WADA) - he added. The meeting is due to take place at FIFA headquarters in Zurich.

A biological passport is designed to keep permanent record of an athlete's blood parameters to detect any suspicious changes, instead of relying on random blood and urine tests alone.

FIFA and WADA have frequently been at loggerheads over anti-doping measures.

Blatter has rejected making footballers available for random out-of-competition drugs testing 365 days a year, a measure introduced this year for athletes in all sports under the world anti-doping code.

Instead, he has insisted that footballers could only be available for tests while they were with their teams.

The footballing and anti-doping bodies have also been at odds over the full duration of a suspension for doping offences.

Blatter suggested during the debate in the Swiss city of Neuchatel that the biological passport could "eventually give greater freedom" to individual athletes and tackle the issue of availability.

But the president of world football's governing body also called into question the reliability of the network of WADA supervised anti-doping laboratories.

- I am attacking, a bit, the laboratories - he said.

- We can ask the question of whether the tests in all the labs are reliable. -