Sam Curran takes 5-26 as Surrey beat Somerset to leapfrog them at top of South Group
Birmingham Bears go top of North Group with 21-run win at Worcestershire
Lyth (90 not out) & Malan (79) ease Yorkshire to eight-wicket win over Leicestershire
Croft hits 101 to set up Lancashire win by 35 runs at Northants
Champions Hampshire slip to narrow six-run loss at Sussex in last-over thriller
Essex recover from 1-2 to chase 176 to win and beat Glamorgan by four wickets
Haider hits last ball for four as Derbyshire earn tie at Durham
Kent beat Middlesex by 13 runs despite 121 not out by Holden
Durham 178 v Derbyshire 52-0 (5.2 overs)
Derbyshire openers Harry Came and Luis Reece bring up a half-century partnership and are setting a good platform for this run chase.
Came has 34 and Reece is on 11. Durham need a wicket or two.
Somerset 30-2 v Surrey 195-9
Tom Kohler-Cadmore pounds Sam Curran past mid-on for four runs.
The left-hander takes his revenge, though, as the Somerset batter top edges an attempted pull and Gus Atkinson does well to keep his eye on the ball to complete a fine over the shoulder catch running back.
Essex v Glamorgan 175-6 (20 overs)
Image source, Rex FeaturesOnly seven off the final over of the innings and Essex will be pleased with their work with the ball.
Timm van der Gugten smashed a career-best 33 off only 14 balls before he was run out, but no-one went beyond Kiran Carlson's 47 at the top of the order.
The home side will fancy chasing this score down.
Somerset 26-1 v Surrey 195-9
Tom Banton was 12 not out off five balls - but he's only managed to add a single from the next six he's faced.
Great over by Gus Atkinson costs him just two runs. Exactly what Surrey need to keep this run-chase in check.
Northants 32-3 v Lancashire 204-7
Luke Wood is on a hat-trick... And Saif Zaib survives the hat-trick ball.
Yorks 35-0 v Leics 195-5
A much better over for Leicestershire's as Naveen-ul-Haq yields only singles. Four gone - Yorkshire need another 161 to win.
Northants 23-1 (2.2 over) v Lancashire 204-7
Image source, Getty ImagesThat is the best way to slow up momentum in T20 cricket!
Emilio Gay goes for another big shot but he sends it sky high and nowhere and is caught.
Somerset 20-1 v Surrey 195-9
Will Smeed hit 94 off 35 balls in his previous T20 innings - what can he do this evening?
He starts by flashing Sam Curran down to third man for four and then comes down the pitch to crash another through the covers.
That's all she wrote, though, as he slices the next to deep point where Tom Lawes makes no mistake with the catch.
Bears 196-5 (20 overs), Worcestershire 167-5 (19 overs)
Worcestershire are going down fighting here.
30 needed off the last over.
But they have got closer than expected after three sixes from Usama Mir, who clearly needed to have come in earlier.
Kent 228-3, Middx 29-2 (3.0 overs)
Both Middlesex openers are gone inside the first three overs at Lord's.
Joe Cracknell was first to go, caught behind off Michael Hogan before skipper Stephen Eskinazi followed him, although not before he had plundered three fours and a six in his 24.
Ryan Higgins and Max Holden are the pair currently charged with the challenge of chasing a steepling 229 to win.
Yorks 30-0 v Leics 195-5
Dawid Malan is clearly not in the mood to hang about.
Back-to-back fours, either side of the wicket, off Colin Ackermann and he is 25 not out from 13 balls at the end of the third over.
Northants 22-0 (2 overs) v Lancashire 204-7
Only two overs gone and Northants openers Ricardo Vasconcelos and Emilio Gay have set about the chase with relish.
Two fours for Vasconcelos and three in a row for Gay off Jack Blatherwick.
Somerset 12-0 v Surrey 195-9
An opening over of contrasts.
No runs from Sean Abbott's first three deliveries, then Tom Banton hits the next two for six - the first a beautifully timed ramp shot and the second a deliberate uppercut over the keeper's head.
Another dot to finish - but Somerset will settle for that first up.
Yorks 21-0 v Leics 195-5
Josh Hull strays onto Dawid Malan's pads and the left-hander whips him away for four.
Another boundary follows before Malan hits the left-armer into the Western Terrace for six.
Essex v Glamorgan 161-5 (17 overs)
Dutchman Timm van der Gugten is sending the ball flying around Chelmsford.
His strike rate is over 300 as he has 28 off nine balls - with three sixes already and he has just smashed Simon Harmer out of the ground twice in an over.
Birmingham Bears 196-5, Worcestershire 135-6 (16.2 overs)
Worcestershire are sliding to a fourth straight defeat here as Kashif Ali becomes the latest Pear to perish, nobly trying to hoist a big one off Hasan Ali.
Yorks 3-0 v Leics 195-5
Spin straight away from the Foxes as Callum Parkinson bowls the first over.
Yorkshire's experienced opening pair - Dawid Malan and Adam Lyth - settle for three singles, but Parkinson thinks he has the former caught behind from his final delivery. The umpire doesn't agree.
Essex v Glamorgan 130-5 (15 overs)
Essex keep chipping away at this Glamorgan batting.
Chris Cooke went for 27 and now Matt Critchley has removed Billy Root for 21 as nobody can play the big innings for the Welsh county.
Callum Taylor and Timm van der Gugten are now at the crease.
Birmingham Bears 196-5, Worcestershire 126-5 (15.2 overs)
Mitch Santner holes out to Ed Barnard at long off - and the home hopes fade even further.
Even wih a past Pears hero like 2018 Finals Day matchwinner Ben Cox coming to the wicket, this looks like it's going to be the Bears' first T20 triumph at New Road in six years!
Birmingham Bears 196-5, Worcestershire 125-4 (15 overs)
Five overs left at New Road.
72 needed.
Unlikely. 14.4 an over.