Hatton does have a straight right, but rarely uses it, generally sticking to the lefts. Calzaghe would beat Hatton P4P, as he is a southpaw. I am not going to get into a debate about who is better. Hatton would look **** against a southpaw club fighter.
He most certainly did. But credit to Calzaghe for realising he couldn't outmuscle him, so he changed tactics.
I wouldn't say Bika bullied Calzaghe at all, but did make it difficult, but I suppose compulsive headbutting does help!