Zain-ul-Hassan scored his maiden Rothesay County Championship century and Kiran Carlson his 16th as Glamorgan hammered out runs against Hampshire.

Zain embodied patience and endeavour, whereas Carlson oppressed the bowling with quick-scoring; however, the differing approaches ended up at the same three-figure destination. The pair put on 273, beating a 55-year record for the highest second-wicket stand for Glamorgan against Hampshire – and just 55 runs off the Welsh side’s all-time second wicket partnership.

Having batted all day, Zain ended on 131, Carlson on 158 and Glamorgan 353 for 1, all the more impressive as they had been put in to bat first.

The pitch looked like bowling would be king, and tempted Ben Brown into choosing to take to the field first after winning the toss, but the green colouring proved deceptive. It offered plenty of zip, and the occasional moments of exciting bounce, but as the day progressed, batting proved to the only way to enjoy things in the middle.

Zain returned to the top of the order for the first time this season after Eddie Byrom was dropped to allow the fit-again Ben Kellaway to return to the middle-order.

The Pakistan-born allrounder had never convinced in first-class cricket, with his name unfortunately most synonymous with twice being the first batter out in a season. He had only scored four previous half-centuries in 31 appearances, but bucked his career form with a day out of resilience and outright quality.

On the other hand, his opening partner is one of the most talked about young talents on the county circuit. Asa Tribe is one of the names in the frame to top the order for England this summer, with his entertaining brand of batting.

The opening pair added 79 for the first wicket, with Tribe taking the lead by scoring 45, but the morning was not as plain sailing as the last two sessions of the day proved.

Zain was caught on 29 at second slip, but earned a reprieve when Scott Currie was signalled to have overstepped for a no ball. Tribe, meanwhile, wasn’t as lucky when he wafted Kyle Abbott to gully, as Glamorgan reached a sedate 89 for 1 at lunch.

Carlson had different ideas for the rest of the day. The Cardiff-born batter took 13 balls to carve his first boundary through point, but rarely slowed from there.

His innings was one of quickly processing the quick pitch, small boundary on one side, lack of movement, and then grinding the Hampshire attack down with run-scoring that barely dipped under a strike-rate of 100.

His carefree 97-ball century, a 16th in first-class cricket, was best snapshotted by an outrageous one-legged flick for six off his hip – and cam in direct opposition to Zain’s deliberate batting.

The South Asian Cricket Academy graduate had a first professional hundred in his sights and wasn’t going to throw it away. He eventually got there in 250 balls and couldn’t hide his smile as he raised his bat to a gleeful dressing room balcony.

Carlson still had time to pass 150 for the sixth time before Hampshire’s bowlers could finally rest for the evening – none of them had managed to go an under three runs per over.