I think it would go to UD for 3G... I don't think ggg can KO the big boys now... 168 is a jump up so I think the SMWs can take his punches...
IMO Groves is top 1-3 SMW at the moment. He would beat Degale again. That said, he isn't elite like Golovkin. He would eat a lot of punches and would be out pointed against Golovkin. He might survive 12rds because the size difference, all though he is a bit smaller than Jacobs and fights more offence minded. Canelo on the other hand, has no chance against Groves, KO8.
That he won from a guy who couldn't decisively beat a past it fighter who couldn't cut it at 160 anymore...
Who has Golovkin beat at 168? Its unknown how his power or chin holds up at a higher weight. He hasn't been too inclined to go there so far.. Groves batters him. His style his made for guys coming forward.
unknown but if 2G managed to boil down to 3Gs weight, 3G would kill him after an early knockdown of 2g. at smw, its not known. youd have to favour 2G.
There was an Interview with ggg in the groves Sparring. Ggg Said that groves has no power, but is a good Boxer