* Chelsea top Premier League with 4-1 win over Cardiff
* Sol Bamba headed Cardiff in front in the 16th minute
* Eden Hazard equalised in the 37th, skipping past two defenders
* Hazard scored his second in the 44th fed again by Olivier Giroud
* Hazard completed hat-trick with 81st-minute penalty
* Willian scored screamer from outside the area in 83rd
* Chelsea at West Ham next, Cardiff host Manchester City CHELSEA 4 CARDIFF CITY 1
Sept 15 (Reuters) - A hat-trick from Belgian magician Eden Hazard ensured Chelsea kept their 100 percent record this season with a 4-1 win over promoted Cardiff City that sent the Londoners to the top of the Premier League on Saturday.