Rikki Clarke followed up his fifer with an unbeaten 35.
Hampshire vs Surrey
After an opening day that saw 17 wickets going down, there wasn't much to separate the two teams in Southampton. Hampshire, having elected to bat first, were able to see off the opening threat of Morne Morkel, only for medium-pacer Rikki Clarke to come in as first-change and blow them away with his five-for. From 18/0, they slid to 26/4, and later 42/5. However, some effective contributions lower down the order pushed them through to a total of 149.
As things turned out, it proved to be a handy score on the board. Surrey's batsmen didn't find life very easy in the middle either. Against a testing seam attack comprising the likes of Kyle Abbott, Fidel Edwards and Keith Barker, the visitors were all over the shop. Hadn't it been for the superb sixth-wicket stand of 72 between Ollie Pope and Rikki Clarke, things could've been really ugly. As it stands, they are close to parity with three wickets in hand.
Brief scores: Surrey 143/7 (Ollie Pope 68, Rikki Clarke 35*; Keith Barker 3/28) trail Hampshire 149 (Kyle Abbott 27; Rikki Clarke 5/21) by 6 runs.
Somerset vs Yorkshire
A run-a-ball 40 from Jamie Overton, at No. 10, came as a welcome boost for Somerset captain Tom Abell, who had been mostly fighting a lone battle until that point as left-arm spinner Keshav Maharaj whittled away at the hosts' lineup. Murali Vijay's struggles in his knock of 7 from 46 balls had served as a forewarning for what was to follow. Eventually though, Somerset were able to post 199, which - as demonstrated by their bowlers later on - was enough to make a fight out of.
After losing the opening pair early against the new ball, Yorkshire stabilised through Gary Ballance and Tom Kohler-Cadmore, but Dominic Bess's late strike to get rid of the fluent Ballance did much to remedy the balance going into day 2.
Brief scores: Yorkshire 70/3 (Gary Ballance 35; Dominic Bess 1/12) trail Somerset 199 (Tom Abell 67, Jamie Overton 40*; Keshav Maharaj 5/54) by 129 runs.
Warwickshire vs Essex
Sam Hain and Matthew Lamb's unbeaten partnership of 129 has put Warwickshire in a really strong position, leaving Essex to rue their decision at the toss. They had a solid foundation to build on, laid by the opening pair of Will Rhodes and Dominic Sibley as the duo weathered out the new ball and then some for around 28 overs, before the fourth-wicket partnership of Hain and Lamb nailed the advantage home. The extent of Essex's blunder to bowl first could well be gauged from how their only successful bowler on the day was off-spinner Simon Harmer, who took all the three wickets to fall.
Brief scores: Warwickshire 269/3 (Sam Hain 77*, Matthew Lamb 69*; Simon Harmer 3/67) vs Essex.
Nottinghamshire vs Kent
A couple of quick strikes with the new ball, having put up a score of 304, left Kent feeling good about themselves at stumps on Day 1. After opting to bat, their scorecard was littered with useful contributions through the order, the most prominent of which came from Daniel Bell-Drummond (45), Heino Kuhn (56) and Darren Stevens (88). Indian off-spinner Ravichandran Ashwin was the pick of the Nottinghamshire bowlers finishing with four wickets.
Stevens, high on confidence after being Kent's top-scorer, then struck immediately in his first over with ball in hand to remove opening batsman Jake Libby LBW, before Matt Milnes castled Chris Nash with stumps looming to have the hosts in a spot of bother.
Brief scores: Nottinghamshire 35/2 (Ben Slater 18*; Matt Milnes 1/9) trail Kent 304 (Darren Stevens 88, Heino Kuhn 56; R Ashwin 4/121) by 269 runs.