Groves was a well-deserved unanimous victor of the bout, but many Twitter users were surprised to see Chris Eubank Jr raise his hands after the fight as if he had won.
'I dropped him at least once but it didn't count.
I'm not completely writing him off, but it takes a certain hunger to be a fighter, and Eubank Jr. grew up in a comfy life not the hard upbringing his father had that made him the fighter he was.
The 29-year-old Londoner will face the victor of next weekend's bout in Germany between his undefeated countryman Callum Smith and Jurgen Brahmer in the final, which is scheduled for June.
"He walked in with his shades on, he doesn't want to be here, he wants to get put into retirement so that's what we're going to do on Saturday night, I'm taking that belt home".
The second defence of his WBA crown comes against an opponent who is keen to step out of the shadow of his father, Chris Eubank - a former world champion - and establish himself in his own right.
The 29-year-old's career has previously been remembered for high-profile defeats - two to Carl Froch and one each to Badou Jack and James DeGale -but Groves proved too shrewd and too accomplished for bookies' favourite Eubank Jr at the Manchester Arena.
Groves looked more at ease without landing big shots on Eubank Jr, who had never been knocked down in his previous 27 professional bouts. George ain't ready, I can see it in his eyes. He doesn't realise the danger he's in but he will find out on Saturday. I've got so much more to achieve in my career. "I'm going to help him on that path".
The theory that Groves, as the natural super middleweight, would tire later on was being disproved as it was Eubank Jr using the ropes to catch his breath. "I've been here, done this so many times now". If he doesn't go through to the final I don't know if that means i go through automatically.
Where Can I Watch The Fight? "It's just another fight".