Surrey beat Essex by 10 runs
Kevin Pietersen out for 52 on return for Surrey
Pietersen did not field after suffering a calf strain while batting
The former England batsman had not played in England since June 2015
Your most memorable Pietersen innings?
Higham Ferrers CC: Has to be the innings at headingly vs South Africa #textgate, external
Dan Stevens: @KP24, external to replace Ballance in the Test team?
Paul Hawkins: Brilliant from Amir and Walter to keep Surrey to 150. Game on
It was only a matter of time before someone brought that up, Dan. Congratulations for getting in first.
Surrey 150-9 v Essex
Essex will be absolutely delighted having won the toss. Surrey got themselves off to a blistering start but the wickets began to tumble and there were simply no partnerships and Essex were never under pressure.
Only Kevin Pietersen really showed for Surrey - and he was dropped on 20. Surrey most grateful for his 32-ball fifty. Even with that knock, this total seems a long way below par and Essex are set for a fifth T20 win on the spin at the Oval
Surrey 150-9 v Essex
Mark Church
BBC Radio London commentator
Surrey are going to need to bowl their socks off tonight.
I enjoyed Kevin Pietersen's innings immensely but the bowling of Mohammad Amir has been stand-out.
A superb final over from Mohammad Amir featuring only four singles. Four overs, 2-13 for Amir, superb.
Surrey 146-9 v Essex
Sharp single attempted by Gareth Batty first ball to try and get Tom Curran on strike, he does, but runs himself out in the process, easy work from Tom Westley.
Tom Curran finds a boundary to fine leg but yet again, it's Essex's over and with just six balls to go, Surrey appear to be falling well short of a good score.
Surrey 142-8 v Essex
Wickets continue to fall as Stuart Meaker chips a catch to point.
10 from Paul Walter's final over but that's still a fine spell for someone so inexperienced, four overs, 3-24. Just two overs to go, can Surrey nudge 160?
Surrey 139-7 v Essex
Image source, Rex FeaturesSam Curran plays a short-arm jab into the middle tier of the pavilion, lovely strike but then gets totally cleaned up and Paul Walter has his third wicket.
Can the Curran brothers lift Surrey to something defendable? They work the angles and run well between the wickets but it's only six from the over, another pretty good one for Essex.
Mark Church
BBC Radio London commentator
Image source, Rex FeaturesI have enjoyed that. It was box-office stuff from Kevin Pietersen with five big maximums, but Surrey needed him at the end because he was doing all the run-scoring for them.
Surrey have lost their way here.
With Kevin Pietersen gone, Essex should be confident of keeping Surrey below 160 at the most and you wouldn't think that would be enough. Surrey have slipped away badly.
Image source, Rex FeaturesIt's a huge wicket for Essex as Kevin Pietersen tries to clear the rope but only swings Paul Walter down long-on's throat.
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Ollie Pope tries to uppercut Paul Walter but it's a long boundary to deep point and he only finds the fielder. Who can stay with KP?
Through Kevin Pietersen, Surrey have a platform for the last five overs but you still think they need fifty from these overs to be confident.
Surrey 119-4 v Essex
Image source, Rex FeaturesRyan ten Doeschate brings himself on and Kevin Pietersen pumps him down the ground for six first ball. Having been dropped on 20, it's now Kevin Pietersen's highest T20 score for Surrey and he raises a first half-century in T20 in England in just 32 balls with one four and fives sixes.
Derbyshire are motoring along nicely at 76-2 after seven overs in pursuit of 187 to beat Worcestershire.
Billy Godleman is unbeaten on 34 off 18 balls, including this six which disappeared out of New Road. But did they get the ball back? Watch this clip to find out.
Ryan ten Doeschate brings back Mohammed Amir. Kevin Pietersen only faces two balls and tries a vicious pull at one of them that only runs for a single.
Image source, Rex FeaturesAnother wicket for Essex keeps them on top of this innings. If they can pick up Kevin Pietersen soon then Surrey may struggle to post a competitive total.