Slow start sets tone at Oval
Traffic meant Jade Dernbach missed Surrey's morning session in the field - and that set the tone for something of a slow day at the Kia Oval.
Dernbach made up for lost time with two wickets immediately after lunch but by then Worcestershire - who also had issues getting to the ground after the closure of Vauxhall Bridge - had already added another 90 runs to their opening-day 329 for four, although they did lose three wickets in the process.
The visitors were eventually dismissed for 476 but Surrey's 134 for two at stumps would have looked much better had Rory Burns, who had played sensibly all afternoon for a hard-earned 79, not been dismissed off what turned out to be the last delivery of the day.
Burns and Zafar Ansari (39 not out off 136 balls) had put on 127 in 50 overs after the early loss of Arun Harinath and both looked well placed to take the fight to Worcestershire on day three.
Overnight centurion Moeen Ali brought up his 150 with a straight drive down the ground but was first man out for 162 when, having been dropped by Gareth Batty the previous delivery, he saw wicketkeeper Gary Wilson brilliantly hold on to a low edge off Matt Dunn.
Ross Whiteley (43) departed to a more straightforward take at slip by Burns off Chris Tremlett and just before lunch Joe Leach was also caught behind attempting to cut off-spinner Batty.
Dernbach's introduction into the attack accounted for Jack Shantry, Wilson's third victim of the innings, and Ben Cox who, having looked good in making 64, picked out Batty at square leg.
Despite losing their last five wickets for 72 Worcestershire still posted their highest total at the Oval, surpassing their 406 for nine in 1938.
Surrey's reply got off to a bad start when Harinath was caught at leg gully via his thigh pad off Shantry but Burns and Ansari ground out their resistance interspersed with the odd boundary.
Burns hit Leach for a four and a pulled six in successive balls, only to allow his concentration to slip at the death as he fell to Saeed Ajmal.