Getty/GOALRichie MillsPep Guardiola spotted giving Boston Celtics head coach Joe Mazzulla advice before NBA finalsP. GuardiolaManchester CityOther SportsPremier LeagueManchester City boss Pep Guardiola has reportedly been giving Boston Celtics head coach Joe Mazzulla some salient advice ahead of the NBA finals.Article continues belowArticle continues belowArticle continues belowArticle continues belowGuardiola a world-renowned coachCity boss seen giving advice to Joe MazullaHis Boston side face Dallas in NBA finalsWho will win the Premier League title?Manchester CityManchester UnitedLiverpoolArsenalChelseaOther25794 Votes