Michael Carberry hit an unbeaten half-century to put Hampshire in the ascendency on day one of their LV= County Championship Division Two clash with Glamorgan at the Ageas Bowl.
The England batsman passed 50 for the second time this season, ending the day on 62 not out in the hosts'119 for one in reply to Glamorgan's 224.
His second-wicket partnership with Liam Dawson, who made 37 not out, was worth 87 and left his side 105 runs behind.
Kyle Abbott, Matt Coles and Sean Ervine earlier claimed three wickets each, the latter returning marginally the best figures of 3-36.
MATCH PIC: @slug_7 clean bowls Graham Wagg in the afternoon session at The Ageas Bowl today. #LVCCpic.twitter.com/6gf1Za5lyf
— Hampshire Cricket (@hantscricket) May 11, 2014
Captain Mark Wallace made an unbeaten 67 for Glamorgan, but their total after losing the toss and being put in to bat looked well short.
Hampshire captain Jimmy Adams went for 13 with the score on 32, but any hope the visitors had of further breakthroughs before the end of the day were foiled by Carberry and Dawson.
The former brought up his 50 with a four square of the wicket off Jim Allenby, one of seven in his 101-ball knock.
Glamorgan's top order, in contrast, had failed to fire, with Gareth Rees departing for seven and Jacques Rudolph for a duck, the South African Abbott's first victim and one of four for Michael Bates behind the stumps.
Michael Bates speaking after an excellent first day for Hampshire v Glamorgan https://t.co/jFDTmezZWv via @audioboo
— Hampshire Cricket (@hantscricket) May 11, 2014
Rees' dismissal left them 12 for two, but Will Bragg helped start the rebuilding process with 49. Support from the other end was in short supply, though, with Murray Goodwin's 23 the best on offer.
When Bragg went, again the combination of Abbott and Bates bringing about his downfall, the Welsh county were 117 for six.
Wallace took up the fight, hitting nine fours in his breezy 90-ball innings to help his side past the 200 mark and beyond as Ervine wrapped up the tail around him.
That put the pressure on those tailenders to do some early damage with the ball, but they found the going tough against Carberry and Dawson. Graham Wagg was the only one to have any success with the wicket of Adams, who was caught behind by Wallace.