Borussia Dortmund's Guinean forward Sehrou Guirassy celebrates with teammates after scoring his team's third goal during the UEFA Champions League, League phase Matchday 5, football match between GNK Dinamo Zagreb and Borussia Dortmund. —AFP/FileBERLIN: Asked to sum up yet another star turn from winger Jamie Gittens on Saturday, Borussia Dortmund coach Nuri Sahin said simply “he has arrived.”Still just 20, Gittens´ recent performances have established the Englishman as Dortmund´s most...