Barcelona reportedly hope to fend off interest in utility man Javier Mascherano from a number of big clubs during the summer transfer window. Spanish newspaper Marca claims that the ex-Liverpool man, who spent most of his career as a holding midfielder before being converted to a centre-half by the Catalan giants, is in demand.googletag.cmd.push(function() { googletag.display(“div-gpt-ad-1389116196215-0”); });Several high-profile clubs are said to have expressed an interest in securing the services of the Argentina international, with former Reds boss Rafael Benitez keen on working with him again at Serie A side Napoli. However, Barca are believed to be preparing a lucrative extension to his current contract, which runs until the end of the 2015-16 campaign. The fiercely-competitive 29-year-old played more than 100 matches for Liverpool between 2007 and 2010 after a short spell with West Ham United. He has become an ever-present at the heart of the Barca defence and is closing in on 100 caps for Argentina ahead of the World Cup in Brazil.