What a start for Hampshire. What a start for Pakistani all-rounder Shahid Afridi!

The 37-year-old slog sweeps Wayne Madsen for a couple of boundaries before belting him straight down the ground and over the rope.

He finishes things by smacking him over cover. 16 off the first over. Wow.

Calvin Dickinson and Shahid Afridi stroll out to the middle for Hampshire.

Spinner Wayne Madsen takes the new ball for the hosts.

It's muggy and overcast at The County Ground - about time we had some warmth!

We're spoiling you with our choice of commentaries tonight.

Charlie Dagnall and former Notts and England batsman James Taylor are in the 5 live sports extra comm box.

BBC Radio Derby and BBC Radio Solent will bring a more local flavour on the wireless.

To tune in click on the tabs at the top of this page.

This evening is about you guys getting involved too.

Derbyshire fans - what's made the difference this season to help you finally make it through the group stage?

Hampshire supporters - does your side have the perfect balance of youth and experience?

Neutrals - who is your pick to lift the trophy?!

Get in touch using #bbccricket on Twitter.

All of the last-eight ties will be played over the next four days.

Here's how the rest of the week is shaping up...

• Wed - Glamorgan v Leicestershire (18:30 BST)
• Thur - Notts Outlaws v Somerset (18:30 BST)
• Fri - Surrey v Birmingham Bears (18:30 BST)

The good news is, we'll have live text, radio commentary and in-play video clips from every quarter-final.

While Derbyshire struggled, Hampshire enjoyed unprecedented success in Twenty20 cricket from 2010 to 2015.

Six-straight Finals Days saw them lift the trophy twice in 2010 and 2012.

Following last year's group stage demise, they're back into the knockout round after ending up third in the tightest of South Groups.

On paper, they're the favourites - but this my friends, is the T20 Blast.

Image source, Rex Features

Falcons fans have had a long wait for a shot at making it to Finals Day. A VERY long wait.

Their only quarter-final came in 2005 and since then it's been 11-straight group stage exits.

Image source, Rex Features

This year has been somewhat different. Eight wins in the North Group saw them finish second.

Wayne Madsen scored runs for fun, and Imran Tahir took 17 wickets.

They'll surely never get a better chance to make the showpiece event at Edgbaston on 2 September?

News from the middle is that Derbyshire have won the toss and chosen to bowl first.

Here are the two line-ups...

Derbyshire XI: Godleman, Critchley, Reece, Madsen, Wilson (c), Hughes, Smit, Henry, Viljoen, Cotton, Tahir.

Hampshire XI: Dickinson, Vince (c), Carberry, Alsop, Bailey, Dawson, Berg, Afridi, Abbott, Wood, Crane.

Good evening and welcome to the first T20 Blast quarter-final of 2017. Hope you are well?

The two teams meeting tonight have somewhat contrasting records in England's domestic T20 competition.

This is only the second time Derbyshire have made it out of the group stage in 15 years.

Their opponents Hampshire are two-time winners.

Who will make it through to Finals Day? All of the action gets under way in about 15 minutes...

Image source, Getty Images