Manchester - George Groves used his experience and boxing skills to earn a unanimous points decision over Chris Eubank Jr on Saturday.
The World Boxing Association (WBA) world super-middleweight champion made a successful second defence by scores of 117-112, 116-112 and 115-113 over his English rival at the Manchester Arena - and in the process picked up the International Boxing Organization (IBO).
But Groves had to survive a nervous last round after he suffered a suspected dislocated left shoulder and Eubank went hunting for the stoppage.
Victory also sent Groves through to the World Boxing Super Series final in June, when he will face either English rival Callum Smith or Germany's Juergen Braehmer.
Smith and Braehmer meet in the other semi-final of the eight-man competition in Germany on Saturday.
It was Groves's finest triumph yet and puts his career in a far better state than it was following defeats to Carl Froch - twice - and Badou Jack in previous world title fights.
Hall of Famer Prince Nassem Hamed was sitting at ringside and trashed the performance by Eubank - calling on the young fighter to retire.
He said Eubank has a very big ego and is nowhere close to being as good as he thinks he is. Based on what he saw, Eubank is not really a big puncher, based on throwing just about everything in his arsenal and never having Groves in serious trouble.
"This guy is not on the level he thinks he is, he's in a dream land." Hamed said to The Mirror.
"I know this sounds terrible but I think he should finish. I don't think he's a hard puncher; in this game you need a get out of jail card, you need to be able to put them away and smash them up.
"He threw the kitchen sink at George Groves but he didn't do anything, not even when George has a dislocated shoulder."