VENICE - Matchday 4 of Serie A kicked off with a resurgence for Fiorentina, who, after three defeats, inaugurated Paolo Vanoli's new coaching reign by beating Venezia 4-2 at the Stadio Penzo and earning their first three points of the season. The star of the match was Argentine Franco Mastantuono, who scored a hat-trick. The Viola's victory came with a comeback that began half an hour into the first half. Venezia took the lead in the 22nd minute when Adams completed a counterattack by bursting into the box and firing a diagonal shot past goalkeeper De Gea. Fiorentina turned the tables…