The Blues legend believes that the Belgium will become more "efficient" under the former Napoli head coach
Eden Hazard can reach his full potential under Maurizio Sarri's system at Chelsea, according to assistant coach Gianfranco Zola.
The Chelsea winger has scored five goals in his last four club appearances and was elected to the 2018 FIFPro World XI ahead of the likes of Mohamed Salah and Neymar on Monday, having helped Belgium finish third at this year's World Cup.
Hazard has been used with care by Sarri in the early stages of the season, featuring as a substitute in the Blues' opening two Premier League matches and being left out of the squad for the Europa League trip to PAOK last week.