The 25-year-old is confident that he can beat Froch at the second time of asking at Wembley later this month, and has revealed that he and his trainer have been debating in which round the victory will be secured.
"I can't see it going longer than three rounds, but Paddy Fitzpatrick thinks Carl will last until the fifth," Groves is quoted as saying by the Daily Mail.
"I guess it depends on how Froch approaches it. He may try to take it as long as possible in the false belief that I will blow up in the later rounds."
Groves put Froch on the floor during their first fight in November before eventually losing to the super middleweight world champion.