Chelsea and belgium play maker Eden Hazard brace marks is 101 goals in league competition.
He scored his 100th goals after 3 minutes before he doubled it in the 77th minutes.
Moses make it 4 in the 89th minutes , thanks to long pass from Mousonda jnr.
Willian make it scored in the 6th minutes to double blues lead after receiving lovely pass from Batshuayi.
CHELSEA (3-4-3): Caballero; Azpilicueta, Christensen, Rudiger; Moses, Kante, Bakayoko, Alonso; Willian, Batshuayi,Hazard.
Chelsea subs: Barkley, Musonda, Zappacosta, Luiz, Eduardo, Ampadu, Sterling.
BRIGHTON (3-4-3): Ryan; Dunk, Goldson, Duffy; Schelotto, Propper, Stephens, Suttner; March, Hemed, Gross.
Brighton subs: Hunermeier, Baldock, Kayal, Murray, Izquierdo, Rosenior, Krul.