When DeGale gets tired he faces front on to often and chucks a windmill punch, a top fighter would clean him out multiple times i suspect. He needs to cut that out of his game. Also when he goes in he is reasonably predictable and kind of ducks in but has little tight fighting game, he certainly does not set himself up well for combo's often enough. When he goes in and catches em a bit with the hook thats it his body position negates the possibility of him being able to follow it up very well.
The early combo's were good to look at but nothing really smashed through unfortunately.