Former super middleweight champion Carl Froch believes Chris Eubank Jr. may be at the point of retirement after suffering a dramatic knockout loss at the hands of Liam Smith.

Eubank Jr. was a tremendous favorite when he entered the ring against Smith, a former junior middleweight world champion who was moving up to 160-pounds.

The fight was fairly even in the first two rounds, before Eubank began to come on in the third.

During the fourth, Smith backed Eubank into a corner and unleased with a barrage of punches to score a dramatic knockdown.

Eubank barely made it up and seemed to be out on his feet. It didn't take long before Smith decked him for a second time and the fight was waved off.

Eubank has the option of exercising an immediate rematch clause, but Froch is not even sure how safely Eubank makes the 160 limit.

"I don't know how he's done the weight or if it's a problem for him, but at 33 years old, middleweight may not be for him. Where does he go from here? That could be curtains on his career. I don't want to say he should retire now. It was a bad defeat," Froch said to Sky Sports.

"Where does he go now? Middleweight or super middleweight? Regardless of the weight, I don't think we should take away from what a magnificent performance it was from Liam Smith.

"He took his time from round one, he won round one and round two on my card, bit of a bad round three. Liam Smith, I thought he had a great start and he was landing more punches and he was putting Chris Eubank on his back foot and controlling and dictating the pace round the ring. Then when he started to land shots, it was fight over."