JACK Burnham's magnificent 135 carried Durham to the brink of maximum batting points as they reached tea on 399 for five from 108 overs, trailing by 58.

Burnham enjoyed some luck but showed remarkable composure and shot selection for one who was 19 in January.

In an otherwise nerveless display he had one slight scare in the 90s when he advanced and got into a bit of a tangle trying to hit Zafar Ansari over mid-wicket. Fortunately, his pads got in the way to prevent a stumping chance.

After joyously punching the air when he scampered the off-side single off Gareth Batty which took him to his 166-ball century he immediately settled in for more.

He was beaten three times in two overs by Matthew Dunn with the new ball and also inside-edged him for four. But he remained totally unflappable and twice middled pulls off Tom Curran to the boundary.

In going for something similar, however, he got underneath it and skied a catch to deep backward square to end his 215-ball innings, which contained 18 fours and two sixes.

Hopes that Ben Stokes would light up the afternoon proved shortlived as his checked drive in the second over after the break gave a return catch to Ansari.

He was out for 12, leaving Michael Richardson to settle in quietly. He also had a slice of luck on nine when aiming to leg off Ansari as a leading edge fell short of mid-off.

Otherwise he progressed solidly and was on 44 at tea with Paul Collingwood on eight.