George Groves is finally a world champion
The Londoner was left in tears as he finally achieved his dream with a sixth-round stoppage in a bruising battle with the brave Russian.
Groves, 29, failed in his three previous attempts to claim a world belt.
He lost controversially to former WBA and IBF champion Carl Froch in 2013 before being knocked out by the Nottingham man at Wembley Stadium in 2014.
‘Saint George’ then came up short when he lost a split decision to ex-WBC champion Badou Jack in Las Vegas in 2015.
But in front of 27,000 fans at Bramall Lane he got over the line and got that belt around his waist.
He said being on the undercard of Kell Brook’s IBF welterweight clash with Errol Spence Jnr would help ease the pressure on him.
George Groves had three failed world title attempts before this fight
But as he walked out to chants of “England, England” he knew all eyes were still on him and this time he delivered the performance needed.
Groves started strongly as he popped out his jab as Chudinov charged in throughout the first round.
The Russian was not being deterred though as he continually went at the Londoner which turned it into an all-action clash from the start.
Groves was happy to sit on the ropes in the second and counter Chudinov, but those tactics were only inviting him on.
The third continued in a similar fashion and Groves appeared to be relying on the judges favouring his more accurate work. The three officials ringside would not be needed though.
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Groves looked to land that jab at the start of the fourth and did so with a right hand following through the Russian’s guard.
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George Groves v Fedor Chudinov – WBA super-middleweight title
But Chudinov was still coming on strong even when Groves found a way through with another decent left and right combination.
Chudinov was smaller than Groves which meant when he dipped in their heads were coming together and the Brit suffered a nasty cut over his left eye towards the end of the round.
Cutsman Mick Williamson, who saved Ricky Hatton on many nights, was going to be busy here to ensure the blood spill wouldn’t cause his fighter any trouble with it being so early in the fight.
This was turning into a bruising contest with Chudinov’s face getting marked up by Groves’ accurate work.
Groves landed with a big right on the counter but his opponent lashed in one of his own at the end of an entertaining fifth.
George Groves dedicated the win to Eduard Gutknecht
The Londoner’s last fight was also a vicious battle that left opponent Eduard Gutknecht in a coma and now needing life-long care.
"I pray for him with my family every day," Groves said.
"I think about him all the time and this win is for him."
The question surrounding Groves was would that happening to an opponent take away his finishing instinct.
That was comprehensively answered in the sixth round when he battered Chudinov with right hands to force referee Steve Gray to step in.
Groves rocked the Russian with a big right to start the assault and, when he noticed his man was in trouble, he showed no remorse as he continued to lash in the big back hands from his orthodox stance.
Big shot after big shot landed and with Chudinov not throwing back, Gray had no option but to step in with one minute 13 seconds gone in the sixth.
And even bitter rival Froch stood and applauded the display.
Groves raised his hands in victory before slumping over the ropes in tears as finally he achieved his dream of being a world champion.