Surrey 105 (Norton 5-50) and 82 for 2 trail Glamorgan 358 (Crane 106, Cooke 101, Atkinson 4-61) by 171 runs

A day of magnificent firsts from Mason Crane and Tom Norton put Surrey in a chokehold at Sophia Gardens.

Crane scored a gritty maiden century, the second of the innings after Chris Cooke's on day one, to total 358 in a remarkable recovery from 79 for 6. The 29-year-old who hadn't scored a half-century before joining Glamorgan two years ago made up for falling for 99 against Leicestershire earlier this season.

Teenager Norton then continued his eye-catching start to the season with a maiden five-wicket haul in just his fourth first-class appearance.

Norton removed England internationals Sam Curran, Dan Lawrence, Ollie Pope and Dom Sibley in an incredible first spell to send him on his way to figures of 5 for 50 with Surrey all out for 105 in just 34.4 overs. They were then forced to bat again on day two, ending play on 82 for 2 after some resistance shown from the openers following on.

Gus Atkinson had continued where he left off from the opening day to end with 4 for 61, his two wickets on day two included centurion Cooke without adding to his score with the second new ball and then Colin Ingram for 80 - after returning from retiring hurt - for the final wicket to wrap up the innings.

Resuming on 244 for 6, Cooke's early departure left Glamorgan facing the possibility of missing out on batting bonus points, but Ingram walked back out after taking a blow to his hand.

Returning on 23 not out, Ingram offered assurance with Crane who edged nearer to his century, having survived a caught-and-bowled reprieve from Ryan Patel on 53 on day one.

When Crane had made 99 against Leicestershire, he attempted an uncharacteristic wild swipe on the final delivery of an Ajaz Patel over, despite battling for over 200 deliveries, as Ryan Hadley was about to be exposed to Josh Hull at the other end. This time he had a more comforting veteran batter for support.

The innings was summed up by Sean Abbott dropping the centurion at square-leg after Jordan Clark had executed a short-ball ploy on 104. The damage had been done, but Surrey's poor efforts still came as a surprise from such a quality outfit.