He's 40 years old and half-shot, his reflexes, balance, and footwork have eroded, he can't get set fast enough anymore.
u dont need to be fast or have good reflexes to throw uppercuts and hooks. look at margarito and rios.
It takes balance and footwork to set up any punch, and it takes Vitali too long to get set these days, if you get inside and crowd him he will never throw anything. Whe he was younger he could fight inside, though not many could get inside on him then.
