|LV= County Championship Division One, Taunton (close, day one)|
|Sussex 145-6: Wells 54, Nash 35, Trego 2-16|
|Somerset: Yet to bat|
|Somerset 2pts, Sussex 0pts|
Somerset made the most of the conditions on a rain-affected day at Taunton to reduce Sussex to 145-6.
Marcus Trescothick won the toss and elected to bowl and was rewarded with a flurry of wickets late in the day.
Lewis Gregory and Peter Trego took two apiece as Sussex slumped from 113-2 to 138-6 in the evening session.
Luke Wells hit a gritty half-century off 118 balls and shared in a 57-run partnership for the third wicket with Chris Nash before falling for 54.
Showers in each session saw 40 overs lost from the opening day's play with the longest break either side of lunch.
Sussex had progressed to 47-0 before the first interruption and when play resumed, Gregory made the first breakthrough with two wickets in two balls.
|Closing in on a landmark|
|Lewis Gregory has taken 25 wickets so far this summer and is just two short of his 100th in first-class cricket|
Ed Joyce (28) edged an attempted pull to Matthew Bates before the first ball to Matt Machan ended in the hands of James Allenby at second slip.
Wells and Nash staged a recovery from 56-2 before an early tea was taken during a third rain break.
Play resumed at 17:15 BST with 20 overs remaining and Craig Overton celebrated a new contract with the club by breaching Nash's defences with a ball which cut back from outside off.
Wells was trapped lbw by Trego who also accounted for Craig Cachopa (8), courtesy of Allenby's second catch of the day.
Alfonso Thomas enticed an edge from Ben Brown before the close and Trescothick held on at second slip.
Just five points separated the two sides - who are fifth and sixth respectively in the Division One table - before the start of play.
Somerset director of cricket Matthew Maynard:
"We will only be able to assess the pitch after both teams have batted on it.
"There was certainly some swing today and our bowlers did not become greedy in making use of it.
"They kept putting the ball in the right places and eventually reaped the reward."
Sussex batsman Luke Wells:
"Somerset bowled well and it's the sort of pitch you never really feel in on.
"I was out there a long time, but never felt totally comfortable.
"We are facing a tough challenge, but are well capable of turning things around on day two.
"If we can scrap our way to 200-plus, our bowlers will relish the chance to perform on that wicket."