Getty Images SportAditya GokhaleChelsea boss Enzo Maresca reveals what 'worried' him about the Blues' Europa Conference League victory over ServetteE. MarescaChelseaChelsea vs Servette FCServette FCConference League QualificationPremier LeagueChelsea beat Servette at home in the first leg of their Europa Conference League play-offs, and Enzo Maresca has revealed he was 'worried'.Article continues belowArticle continues belowArticle continues belowArticle continues belowChelsea win 2-0 over Servette in UECL playoffSuffered late barrage from Swiss sideMaresca reveals he was worried about conceding