Groves wins with fourth round knockout, fights Chris Eubank Jr in the World Boxing Super Series semi-finals
Groves has won 27 of his 30 professional fights, Cox loses for the first time in 25 bouts
Groves successfully makes the first defence of his WBA world super-middleweight title
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We have an-all British list of officials, with Steve Gray the referee and Howard Foster, Terry O'Connor and Dave Parris the scoring judges at ringside.
Foster was the referee for Groves' first fight against Carl Froch, which ended with a controversial stoppage of Groves in the ninth round as he lost his first attempt to win a world title.
Image source, PAIt looks a great sight at the Wembley Arena as a lightshow goes around the venue, with strobe lights flashing from ringside to the roof, before we hear the British national anthem.
What's going to happen tonight? Tweet us using the hashtag #bbcboxing and tell us.
Image source, ReutersCox has made his way to the ring, and now it is George Groves' turn as the sounds of the Prodigy blare out around the Wembley Arena.
Groves has fought in front of 80,000 at Wembley Stadium, but it is the Arena next door for him tonight.
This is the first time in his career that he walked to the ring with a world title in his possession. It has been an epic journey to get to this stage, can he hold on to his treasured gold?
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Not long now.
Just a reminder, George Groves had his pick of his opponents in this tournament and decided to face Jamie Cox.
Groves clearly thinks Cox is the weakest fighter in the tournament, how much will that fire up the underdog?
Chris Eubank Jr, who fights the winner, has been talking to ITV Box Office. He says: "I'm happy with the performance (against Avni Yildirim last week) and we're in a great position now where we can watch these fighters and the winner has to fight me in the semi-finals.
"This tournament is about preserving energy. I knew I had to get this guy out as quick as possible as I'm having a fight three months later. If these guys have a tough night that is better for me.
"The fans have been asking for me to fight George Groves for years so hopefully we can give them what they want in January. Jamie Cox is still a dangerous man, but I think Groves will be able to handle what Cox has. I expect Groves to win. A late stoppage for Groves."
Former IBF world middleweight champion Darren Barker is another who expects Groves to triumph.
Not many are expecting Cox to do the business.
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British light-heavyweight champion Frank Buglioni is expecting a one-sided contest tonight.
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Former featherweight champion Prince Naseem Hamed is ringside, alongside promoter Kalle Sauerland.
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Some stats for you on both fighters, courtesy of the World Boxing Super Series Twitter account.
The stats that stands out for me is that George Groves has boxed 182 rounds, 75 more than his opponent.
Will that extra experience prove crucial?
Image source, WB Super SeriesChris Eubank Jr clearly thinks he will be fighting George Groves in January as he posted this tweet after his win over Avni Yildirim last week.
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Chris Eubank Senior, whose son will face the winner, wrote on Twitter: "George Groves is fighting a dangerous man in Cox. Cox is fighting for redemption &that=hope, hope is tough and can be relentless."
Image source, Getty ImagesChris Eubank Jr beat Turkey's Avni Yildirim inside three rounds last weekend and is set to face the winner of Groves v Cox in January
As always we want your thoughts and comments on the action.
Tweet us using the hashtag #bbcboxing and we will post the best messages on this page throughout the evening.
Who is likely to win the World Boxing Super Series, and why?
The World Boxing Super Series has been described as the "Champions League of boxing" with two tournaments, one for cruiserweights and one for super-middleweights.
Each category offers a $25m (£19m) prize fund and a trophy named after late boxing great Muhammad Ali, with the winner of each expected to receive $10m (£7.6m) in total over the three victories needed to land the title.
World championship belts are also on the line during the individual fights in the new event.
This is the third quarter-final of the super-middleweight tournament, with Britons Callum Smith and Eubank Jr already qualified for the semi-finals.
Smith will face the winner of the fourth quarter-final between Germany's Juergen Braehmer and American Rob Brant, who fight in Germany on 27 October.
Image source, Getty ImagesJamie Cox won light-welterweight gold at the 2006 Commonwealth Games as an amateur, and has held European and Commonwealth super-middleweight belts as a professional.
"This is the first time I've fought for a world title and I've trained very hard and I'm ready for the occasion," added Cox. "The fans can expect a great win."
"When I look at him, I see a scared man."
Image source, ReutersGeorge Groves failed in three attempts to win world titles - against Britain's Carl Froch twice - including one fight in front of 80,000 people at Wembley Stadium - then in a controversial split decision to Sweden's Badou Jack in September 2015.
But he finally secured one when he stopped Russian Fedor Chudinov in the sixth round of their fight in May in Sheffield.
"I've worked my whole life to become world champion and I'm not going to give it up for anything," said 29-year-old Groves at Friday's weigh-in.
"It's very important for me to win this tournament," said Groves. "I know what needs to be done and I'm feeling very good.
"I'm always in exciting fights and Jamie is an all-action fighter. We will see if he wants to run or have a fight. Either way I will win."
Image source, ReutersHello and welcome to BBC Sport's live text commentary on another big night of British boxing with our attentions focused on an all-British world title fight as George Groves aims to hold on to his WBA Super-Middleweight Championship when he fights Jamie Cox.
George Groves experienced the pain of three failed world title attempts before he finally got his hands on the belt that he always dreamed of winning.
Now, his first defence sees him take on an unbeaten Brit in the form of Jamie Cox, who is aiming to cause a shock and steal Groves' belt off him.
Throw in the fact that this fight is also a quarter-final in the World Boxing Super Series, with a fight looming against Chris Eubank Jr for the winner then there is an awful lot on the line. Who will be successful?
Image source, Reuters