straight to your inboxBarcelona will listen to offers for forward Antoine Griezmann amid links to Manchester United despite the club's official angle being he is not for sale, according to reports.Griezmann joined Barcelona last summer from Atletico Madrid but has endured a difficult first season at the Nou Camp.The Frenchman has scored 15 goals in 46 appearances this season but has often had to settle for a role as an impact substitute and his brother recently hit out at current manager Quique