Notts Outlaws and Kent Spitfires confirm places in quarter-finals
Kent beat Surrey by nine wickets to strengthen position at top of South Group
South Group: Gloucestershire beat Middlesex by 10 runs
Hampshire beat Somerset by 75 runs, Sussex beat Essex by six wickets
North Group: Worcestershire Rapids beat Birmingham Bears by 49 runs, Lancashire beat Northants by eight wickets
Leaders Notts Outlaws beat second-placed Yorkshire Vikings in shortened game by 10 wickets
Derbyshire beat Durham by six wickets
Lancashire Lightning v Northamptonshire Steelbacks 127-4 (16.3 overs)
It's a third T20 Blast half-century for Rob Keogh, who's got to 51 runs off 42 balls.
The 29-year-old has kept the Northants innings together after a horrid start for the visitors.
We're at the business end. Lancashire will still be relatively happy.
Surrey 104-6 (14.5 overs) v Kent
Kent finally break the partnership between Jamie Overton and Jordan Clark.
They put on 45 before a waist-high delivery from Adam Milne flew up off Overton's bat and was caught by Joe Denly.
Notts Outlaws v Yorkshire Vikings (start delayed by rain)
Image source, Getty ImagesThe covers remain on at Trent Bridge.
It's still raining lightly but it's brightening up and the umpires are coming out for a look at the pitch.
Fingers crossed.
Lancashire Lightning v Northamptonshire Steelbacks 116-4 (15 overs)
Rob Keogh is motoring for Northants, on 44 off 37 balls after a massive slog sweep for six.
Saif Zaib is at the other end after Mohammad Nabi was dismissed lbw for 27.
Lancashire have lost control of this a bit.
Surrey 102-5 (16 overs) v Kent
Jamie Overton has given Surrey a bit more respectability.
He's hit three sixes, and is 22 not out.
Jordan Clark is with him on 20.
Adam Milne is coming back into the Spitfires attack.
Birmingham Bears 48-2 (6 overs) v Worcestershire Rapids 174-6 (20 overs)
More good bowling from Chris Morris has picked up the second Birmingham wicket at New Road before the end of the powerplay.
He cleans out Will Rhodes' stumps, as the Rapids batsman departs for 11.
Morris has figures of 2-9 from his first two overs.
The hosts were 64-0 at the same stage.
Surrey 75-5 (14 overs) v Kent
Jordan Clark and Jamie Overton have quite a bit of rebuilding to do for Surrey.
They've just taken 12 runs off Darren Stevens' second over of the game.
Essex 47-1 (6 overs) v Sussex
Essex end the powerplay at Hove having just lost one wicket - Adam Wheater for 6.
Michael Pepper is 25 not out, with Tom Westley unbeaten on 15.
Chris Jordan went for 12 runs in his first over.
Lancashire Lightning v Northamptonshire Steelbacks 89-3 (12 overs)
Rob Keogh (26 not out) and Mohammad Nabi (25 not out) have passed the 50 partnership for Northants' fourth wicket.
Nabi strikes the first six of the innings over long-off and looks in a potentially mischievous mood after taking his time to get in.
The runs are starting to flow a bit easier now.
Surrey 59-5 (11.5 overs) v Kent
Debutant Tim David was starting to get in the mood, hitting a couple of huge sixes.
But his innings becomes a cameo as Ben Cox takes a stunning catch at long on to dismiss the Singapore international for 20.
The batsmen crossed, and then Darren Stevens sees Rory Burns caught by Fred Klassen at short third man.
Surrey are in deep trouble and the old stager is now on a hat-trick...
Lancashire Lightning v Northamptonshire Steelbacks 67-3 (10 overs)
Image source, Rex FeaturesWe're at the midway point of the Northants innings and Lancashire remain on top.
Rob Keogh (20 not out) and Mohammad Nabi (15 not out) have steadied things for the visitors and could be key to them building a decent score.
The Steelbacks will want to get to at least 140-150 to make Lightning think about things.
Birmingham Bears 20-1 (2.1 overs) v Worcestershire Rapids 174-6 (20 overs)
Birmingham have made a good start to their chase, but then Chris Morris breaks the opening stand with his first ball.
He bowls Adam Hose for 9.
Will Rhodes comes to join Ed Pollock in the middle.
Surrey 42-3 (10 overs) v Kent
Extraordinary inning unfolding at the Kia Oval.
Surrey get their first boundary in the 10th over of the game, a Rory Burns misses a Jack Leaning ball which runs away for four byes.
Then Burns reverse sweeps for four runs off the bat.
And the England man repeats the trick straight away!
That makes the score a bit more respectable - but it's been a very poor start.
Hampshire 5-1 (1.4 overs) v Somerset
D'Arcy Short tries to go for a big hit into the legside off Jack Brooks early in Hampshire's innings, but can only pick out a fielder on the rope.
Will Smeed is the man with safe hands for Somerset.
Essex 8-1 (1.1 overs) v Sussex
An early wicket for the Sharks.
England international Ollie Robinson grabs a wicket with his first ball, as Adam Wheater is caught by Ravi Bopara at cover.
Birmingham Bears v Worcestershire Rapids 174-6 (20 overs)
Birmingham are getting going with their reply at New Road.
The Bears require 175 to secure a sixth win of the group stage and keep their hopes of a quarter-final berth alive.
Ed Pollock and Adam Hose are opening the batting, with Ben Dwarshuis handed the ball.
Durham 40-2 (3.3 overs) v Derbyshire
Graham Clark finds the boundary a few times to get Durham motoring along, but then rather tamely gets himself caught at mid-on after making 26 from 10 balls.
Durham's hopes of making quick runs in the powerplay just reined in a touch.
Notts Outlaws v Yorkshire Vikings (start delayed by rain)
There's no imminent prospect of play at Trent Bridge, with rain still falling.
At best it looks like we'll get a shortened match, which is a shame for a highly-anticipated top of the table match.
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Lancashire Lightning v Northamptonshire Steelbacks 42-3 (6 overs)
After a torrid first couple overs, Northants skipper Josh Cobb was starting to look good with three boundaries and some inventive shots.
But he picks out backward square-leg for another soft Steelbacks dismissal as he departs for 20 off 17 balls.
All in all it's a successful powerplay for Lancashire, with Steven Croft, Tom Hartley and Liam Hurt all amongst the wickets.
Sussex Sharks v Essex Eagles (19:00 BST)
Image source, Rex FeaturesSussex began the day in the fourth qualifying spot in the South Group, but were shunted down to fifth after Gloucestershire beat Middlesex this afternoon.
The Sharks' hopes of progressing to the quarter-finals were stung by five consecutive wash-outs last month.
There's surely no danger of that this evening, with Hove bathed in sunshine this afternoon.
Sussex, who welcome back Chris Jordan, Ollie Robinson and Delray Rawlins, will bowl after winning the toss.
Essex, champions in 2019, have won four of their past five and could do with victory to stay in the hunt for a quarter-final berth.