Barca stressed that there was a buyout clause of 100 million euros in the contract of the 29-year-old.

Mascherano arrived at Barcelona from Liverpool in 2010 and he has played 184 matches for the Spanish giants.

He has won the Champions League (2011), two La Liga titles (2011, 2013), a King's Cup (2012), a European SuperCup (2011), two Spanish SuperCups (2012, 2014) and a World Club cup (2011) with Barcelona.

Mascherano is currently with Argentina preparing for the June 12-July 13 World Cup finals. The South Americans are in Group F with Bosnia, Iran and Nigeria.