Calzaghe is 8/15 with Will Hill, Hopkins is 5/2 with Bet365. The draw you can get for 22/1 at a few places.
If you were really clever, you could place bets to guarantee a profit.
EG- Bet £90.10 on Hopkins, £206.10 on Joe and £13.50 on a draw.
WITH ALL OUTCOMES you would make a profit in the region of £5.50
OK, hardly "bank breaking" but still....