JASON Roy and Zafar Ansari frustrated Durham after Graham Onions took two wickets in four balls shortly after lunch.

After an unbroken stand of 76 Surrey were 176 for three at tea in reply to 401 with Roy leading something of a charmed life to reach 48.

On 18 he edged Brydon Carse just wide of gully when looking to play to leg, then he hit Paul Collingwood's first ball just out of short extra cover's reach, and on 42 Onions had him in all kinds of trouble.

He went within a gnat's whisker of playing on before being beaten twice in the same over.

Ansari concentrated on survival in reaching 26, his one stroke of luck coming on ten. Collingwood posted his second slip well wide of first and the edge bisected them at waist height.

Onions beat Dominic Sibley's forward push on 31 to nick the off stump then nipped one back to have Kumar Sangakkara lbw for 48.