By Alessandro Schiavone A former teammate of Christos Tzolis has backed the new Arsenal winger to come up trumps in English football. Premier League champions Arsenal nipped in to nab the Greece international for £34m as a replacement for Besiktas-bound Leandro Trossard last week. And the incoming Club Bruges starlet has what it takes to take centre stage in the Premier League thanks to his ambidexterity, ability to combine with teammates and knack for goals. Tzolis made 40 g