West Ham have confirmed that Radoslav Kovac has departed the club for Basel in Switzerland. Despite having one year remaining on his contract, Kovac had grown disappointed with a lack of first team opportunitys, Since falling down the midfield pecking order under Avram Grant. Kovac has decided to embark on a fresh challenge, despite the arrival of new manager Sam Allardyce and the prospect of a fresh challenge in the Championship. League Champions Basel have offered the former Czech Republic international a two-year deal as they prepare for UEFA Champions League football. Kovac, 31, could face the Hammers when Basel take on Allardyce's side in a pre-season friendly on 13th July. Kovac initially joined West Ham from Spartak Moscow in January 2009 before making the move permanent the following August.