I really can't make up my mind here.Harvey was a cautious performer who lacked power.Kovalev was a decent boxer who did have real power,all his effective punches were long ,but he could jab you and set up his right hand.I'll go for Kovalev.
Mcvey great breakdown exactly the way I feel, Kovalev needs distance to punch, his power is on the end of his shots like Kelly Pavlik. If you get caught on the end of one of those shots it might be goodnight.