Barcelona's attempts to tie Lionei Messi down at the club has been condemned by the worldwide players union FIFPro.

Messi recently extended his contract with the Catalan side to 2016 and also had his buy-out clause increased from from €150 million to €250 million.

FIFPro thinks Messi's deal contravenes the labour rules set by the European Commission.

"According to rules adopted in 2001 at the Commission, the duration of a contract should be between one and five years. Messi's new contract with Barcelona is until 2016," said Philippe Piat, president of FIFPro's European Division, as quoted by Marca.

"It does not conform with the spirit of the texts of FIFA," Piat said before adding that he has yet to receive a response to his letter from football's governing body or the European Commission.