Matthew Critchley: Derbyshire teenager calm for maiden ton

Teenage batsman Matthew Critchley tells BBC Radio Derby he managed to remain relatively calm as he closed in on a maiden first-class century in just his second Derbyshire appearance.

Critchley, 18, scored 137 not out to help his county recover from 83-4 to 343 all out by the close of the first day of the Championship match against Northants.