Kevin Pietersen injured as Sam Curran stars in Surrey's T20 Blast win

Former England batsman Kevin Pietersen had a night to forget at The Oval as Surrey beat Middlesex by 15 runs in the NatWest T20 Blast London derby.

The 37-year-old, who struck a half-century on his return to English domestic cricket earlier this week, passed a fitness test on a calf injury to play but saw the problem flare up again as soon as he reached the crease.

Pietersen faced one delivery, which led to the run-out of Aaron Finch when he rejected a quick single, and then called for a runner before holing out off Steven Finn for four off nine balls.

Pietersen appeared in some discomfort as he trudged off the pitch and up the stairs to the changing room, where a furious Finch was sitting following his dismissal for a 22-ball 40.

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Surrey managed to post 156-7 and then saw Sam Curran take 3-28 to restrict Middlesex to 141-7 and complete their fifth consecutive home T20 win over their local rivals.

Hampshire missed the chance to leapfrog Gloucestershire to the top of the South Group after losing to Essex by seven wickets at Chelmsford.

Ravi Bopara took 4-19 to restrict the visitors to 124-9 before Dan Lawrence hit 47 and Adam Wheater contributed 44 not out to see Essex home with six overs to spare.

Sussex remain bottom after their match with Glamorgan at Cardiff was abandoned with Ross Taylor unbeaten with 40 of the visitors' 87-2 after eight overs.

Somerset's local derby with Gloucestershire at Taunton was called off without a ball bowled.

Riki Wessels smacked a 50-ball century to help Nottinghamshire record their highest Twenty20 total in a dramatic six-run victory over Derbyshire at Trent Bridge.

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The right-hander finished with 110 and Brendan Taylor weighed in with a 42-ball 67 to help Notts amass 227-3 in their first game since the retirement of prolific sprint-format batsman Michael Lumb.

Derbyshire gave it a good go in their mammoth chase, Wayne Madsen smashing 86 not out off 44 balls, but they could not manage the 21 runs required from Jake Ball's final over.

Leicestershire's 100 per cent record ended with a two-run Duckworth/Lewis defeat to Northamptonshire at Grace Road - the Foxes finished on 107-3 in pursuit of 110 after Northants posted 165-8

England international David Willey belted 70 off just 38 balls as Yorkshire beat Birmingham by 29 runs at Headingley.

Willey struck four fours and six sixes to lift the Vikings to 179-5, which proved too much for the Bears as they were dismissed for 150 with Azeem Rafiq and Tim Bresnan both taking three wickets.

Worcestershire's fixture with Lancashire at New Road was washed out