Michael Bevan scored his first Championship century of the season yesterday, but then admitted:

"I didn't hit the ball as well as I have done."

The Australian left-hander scored 107 as Sussex piled up 433-8 on the second day against Glamorgan.

Bevan, who made his fourth hundred for the county, said: "I've been getting 30s and 40s, but perhaps I didn't hit the ball as well as I have done this season and I got a hundred. It's a hard one to work out."

Bevan shared in a stand of 130 in 34 overs with skipper Chris Adams, who made a season's best 90, before he was caught at second slip off Steve Watkin after hitting 12 boundaries.

"It's a nice wicket to bat on and I would have liked to have gone on to get a big hundred, but the ball I got out to was there to be hit and I got a nick - it wasn't my day for a big one," he added.

Sussex's openers, Richard Montgomerie and Toby Peirce, gave them the perfect platform with a stand of 106 in 41 overs and Bevan praised their contribution.

"They played really well," added Bevan. "It does make a difference as a No 3 batsman when you come in with the ball 40 odd overs old and the bowlers are a little bit tired."

By the close Sussex had built up a commanding lead of 248 and they are in a position to force their first Championship victory of the season.

"It's a flat wicket, which makes our effort in bowling them out for 185 even more commendable," added Bevan.

"If we do that again today then we've got a great chance.

"To be fair we have bowled and fielded well all season, but our batting has let us down a bit.

"But in the last couple of games we have got scores on the board and once we do that we are a good side."

Sussex's chances of victory may be improved by the absence of Glamorgan captain Matthew Maynard who was unable to field yesterday because of a twisted knee and may not be able to bat.