Getty Images Ritabrata Banerjee'We have to change' - Xavi slams Barcelona players after disappointing Rayo Vallecano drawBarcelonaXavi HernandezRayo Vallecano vs BarcelonaRayo VallecanoLaLigaBarcelona manager Xavi suggested that his players have to have a winning mentality if they want to lift trophies this season.Article continues belowArticle continues belowArticle continues belowXavi slams Barcelona playersBarca played out a 1-1 draw against Rayo VallecanoBarcelona players lacking winning mentalityArticle continues below