Surrey boosted their NatWest T20 Blast qualification hopes with a narrow three-wicket win over South Group rivals Somerset in front of the Sky Sports cameras on Wednesday night.
The Londoners leapfrogged Glamorgan and Hampshire into second place with their seventh win in 11 matches, thanks in the main to a disciplined bowling and fielding display which limited the Cidermen to just 136-9.
Pace bowler Matt Dunn took 3-8 after the hosts had opted to bowl first and, despite a lower-order wobble with the bat, Surrey scraped home with five balls remaining.
The defeat means Somerset stay in fifth place with two group games to play, while Surrey, who finish with three away fixtures, have the prospect of a home quarter-final in their own hands.
Surrey appeared to be cruising towards their 137-run target when Kevin Pietersen and Tillakaratne Dilshan took the score to 70-1 in the ninth over in front of a packed-house at the Kia Oval.
Pietersen struck a season's best 39 but when he and Dilshan fell in the space of six runs, the home side stuttered badly.
Leg-spinner Max Waller bowled Pietersen and lured Gary Wilson into a top-edged sweep, piling the pressure on Surrey's lower-order with the required run-rate beginning to rise.
Azhar Mahmood and Robin Petersen were involved in a farcical mix-up which left the latter stranded but Chris Tremlett (11no) and Zafar Ansari (6no) saw Surrey home in the final over.
Surrey seamer Dunn had earlier taken career-best bowling figures in the competition from just two overs to stall the Somerset innings.
Nick Compton (20) and Peter Trego (30) both wasted starts and only James Hildreth's 28 down the order set Surrey a competitive run-chase.