Ben Duckett piled on the frustration for Sussex on the opening day of the County Championship season at Northamptonshire.

Duckett completed his century as Northants reached tea on 221-1 having been put into bat by stand-in skipper Ben Brown, who was leading Sussex for the first time with captain Luke Wright ruled out due to a back injury.

Steve Magoffin provided the only breakthrough for Sussex after lunch as he trapped Jake Libby lbw for 42 after he had put on 130 for the first wicket with Duckett.

That did not slow Northants down though as skipper Alex Wakely joined Duckett to put on an unbeaten stand of 91.

Duckett reached his hundred from 139 balls (15 fours and a six) and had moved on to 131 at tea while Wakely is 36 not out.