|LV County Championship Division Two, The Swalec Stadium|
|Close, day one: Glamorgan 313-3 v Essex|
|Glamorgan 3pts, Essex 1pt|
Alviro Petersen hit his second County Championship century of the summer as Glamorgan dominated the opening day of their game with Essex in Cardiff.
Essex went wicketless in the opening session after choosing to field as Petersen shared 184 for the first wicket with Gareth Rees (76).
The South African opener went on to compile 133 before being caught behind.
But Will Bragg (46) and Michael Powell (33no) continued the onslaught as Glamorgan closed on 313-3.