West Ham United have signed Argentinean duo Carlos Tevez and Javier Mascherano from Brazilian club Corinthians, the Premiership side announced on Thursday. "The pair have been signed for an undisclosed fee and put pen to paper on permanent contracts with the Club this afternoon," read a statement carried by West Ham's official website. "The transfers represent a massive coup for the Hammers, who have beaten off some of Europe's biggest clubs to secure the services of the duo." Striker Tevez and midfielder Mascherano played a key role in helping Argentina reach the 2006 World Cup quarter-finals. Both players are currently with the national team, preparing for the friendly game against Brazil at Arsenal's venue Emirates on Sunday.