By Jamie Spencer Xavi hasn’t ruled out signing a new contract at Barcelona beyond the end of his existing deal in 2025, having reversed his decision to walk away this summer. Barcelona confirmed on Thursday morning what was initially reported on Wednesday night about Xavi changing his mind, having previously announced in January his decision to step down at the end of the season. As it stands, the 43-year-old is only under contract to continue until the end of next season. Nothing is planned beyond that, but Xavi didn’t reject the idea of staying longer. “There is a lot left [on the current co…