Somerset 66 for 1 trail Hampshire 219 (Adams 61, Overton 5-42) by 153 runs
Scorecard
Jamie Overton turned Hampshire's day on its head with a devastating five-wicket haul at the Ageas Bowl. Overton ended with season's-best figures of 5 for 42 as he tore through the Hampshire middle order, after Jimmy Adams' fifty had given them the perfect start.
Somerset continued to strengthen their position by reaching the close 66 for 1 - with Marcus Trescothick and Johann Myburgh sensibly seeing out the day.
Hampshire, after winning the toss and batting, got off to a fine start with their highest first-wicket partnership of the season. Captain Will Smith elevated himself to the top of the order and put on 89 with Adams in a chanceless stand. Smith was the only casualty of a positive morning when he edged to second slip for 32.
The second-wicket stand between Adams, who had passed fifty in 85-balls brought up with a delicious cut shot, and Tom Alsop added another 48 runs as danger looked a long way off.
But then Jim Allenby sprung into life, having Alsop leg before and then bowling Liam Dawson. Jamie Overton got his first thanks mainly to a good midwicket catch by Chris Rogers, a ball which left Michael Carberry's bat and never seemed to get more than a few centimetres off the grass.
Sean Ervine and Lewis McManus continued the procession - the former edging behind before wicketkeeper McManus had his middle stump pointing towards fine leg. Gareth Berg and Mason Crane did not hang around either as Overton, who is in the England performance squad this summer, completed his first five-for of the season, and second in his career, both wickets lbw.
At that stage Hampshire had lost six wickets for 11 runs to dramatically collapse, admittedly with the ball swinging.
Tino Best and Ryan McLaren temporarily paused the wicket flow with a 24 run partnership, the first pair to get to grips with the conditions. But that was short lived as Jamie's brother Craig Overton found Best skying to Rogers at mid-on. The hosts had been bowled out for 219, after collapsed from 166 for 2 soon after lunch.
Somerset's reply started poorly as Rogers tamely edged his first delivery - a ball on his legs - to McManus. Best attempted to bowl at ferocious speed but could not find the wicket he wanted, despite a close leg before shout to Trescothick - soon after he was warned by the umpire for his follow through.
Former England international Trescothick reached close on 33 with Myburgh 29, the duo watchfully playing out the day to trail by 153 runs.
