i didn't say watch the fight in slow motion as others suggest. just get a clear copy of the fight and see those puunches clearly if it connected or not. but of course it would not hurt watching in slow motion since you would be pretty sure if a punch connected or has been blocked.
I never watched any replay up to this time. I had Marquez winning by 2 rounds when I watched it live.
i seldom bother scoring fights when i watch it live. it just take out the excitement. what i do is try to count back which rounds i scored for whom when it was likely to go to decision at the last few rounds.