By Sean Walsh Roberto De Zerbi has admitted he is happy at Brighton & Hove Albion but is open to working for ‘a big, big team’ in the future amid links to Barcelona or Liverpool. Barca are on the hunt for a replacement to head coach Xavi and De Zerbi has been linked with a move to Catalonia by the Catalan press, while 90min reported earlier this week the Italian is a serious contender to succeed Jurgen Klopp at Anfield. In an interview with Sky Sports, De Zerbi revealed his focus is on improving Brighton, but he is determined to compete for titles in his career. “We feel we can write another p…