Greg Smith continues to edge towards his century but Jade Dernbach keeps the scoring down to just eight runs.

A throw from the deep from Kumar Sangakkara off the final ball comes in just wide of Dernbach and the bowler is unable to gather with Greg Smith out of his crease. Big opportunity missed.

Josh Cobb has Tweeted his support for his former Leicestershire team mate Greg Smith as he approaches his century.

Dan Christian hits 50 (38 balls, 2 fours, 3 sixes)published at 40 overs

40 overs

209-4 (Smith 91, Christian 52) Target 301

What a crucial innings this is for Notts. The big Australian brings up his 50 with a huge six over long on off Zafar Ansari.

We're into the last 10 overs. Who's your money on?

Jade Dernbach comes back with Surrey desperate to break this partnership.

If either of these two are still at the crease at the end, you would have to assume Notts will be mightily close to the target or celebrating the win. 

Just five singles off the over though and the required run rate is still hovering around 10 an over.

Zafar Ansari is yet to concede a boundary in the eight overs he has bowled so far. He's taken for eight off his latest, with Dan Christian running well to take a couple of twos. 

With Steven Mullaney, Chris Read and Stuart Broad to come, there's certainly a bit of firepower left Jon.

A good over by Tom Curran is ruined as the final ball is drilled straight back past him by Greg Smith.

Notts need another 117 from 78 balls.

I think a lot of Surrey fans will be feeling the same Jason. Are Notts slight favourites now? 125 needed off 84 balls.

A misfield gifts Dan Christian a couple through midwicket. It's followed up by a poor short ball from Sam Curran from around the wicket and Christian gleefully sends the ball for four.

Are the nerves of a tense match finally getting to the 17-year-old?

The partnership between Greg Smith and Dan Christian is beginning to build as Smith just sends the ball over the top of Sam Curran at mid-off and finds the boundary.

Surrey captain Gareth Batty looks deep in thought out on the Oval pitch, he knows Notts are far from out of this.

We could be heading for a very tight finish.

Gareth Batty decides it's time to double up on pace and bring Sam Curran back as well.

The 17-year-old, who is doing A-Levels in PE, Business Studies and Art, gets a couple of words of wisdom from his older brother Tom between balls.

Dan Christian keeps out a yorker well before swatting a full toss away for four.

Time for a return to seam bowling as Tom Curran is reintroduced to the attack.

After a couple of expensive overs after Dan Christian's maximum hitting, Curran does well to only be hit for three singles

Notts 152-4 (Smith 64, Christian 23)published at 32 overs

32 overs

Target 301

Dan Christian has obviously decided he's tired of taking ones and twos, as he sends the fourth ball of Aneesh Kapil's over for a maximum over square leg as Notts' 150 comes up.

Another huge blow by the Australian.

Notts 137-4 (Smith 59, Christian 13)published at 31 overs

31 overs

Target 301

Massive six by Dan Christian as he sends the ball into the top balcony of the Pavilion.

Gareth Batty's most expensive over as he goes for 12.

We've seen Christian can strike a big ball...remember his 129 off 57 balls for Middlesex in the T20 Blast last year?

Image source, Getty Images

Notts continue to tick along, picking up seven runs off Aneesh Kapil - with a couple of wides.

The visitors require another 176 runs from the remaining 20 overs at The Oval.

Greg Smith hits 50 (68 balls, 2 fours, 1 six)published at 29 overs

29 overs

Notts 118-4 (Smith 51, Christian 4)

Greg Smith reaches his half-century with a single down to long on, having been brought into the team for the absent James Taylor.

If Notts are going to have any chance of winning the semi-final you would assume Smith needs to convert this into just the second List A century of his career.

Aneesh Kapil, in just his second match in the One-Day Cup this season, is brought on and goes for just one single.

While Notts only had one spinner in Samit Patel, Surrey duo Gareth Batty and Zafar Ansari are doing a great job for Surrey and are rattling through their overs quickly. 

The visitors have to rebuild once again.