Assuming all these fighters are in their primes.

Ali vs Tyson - Tyson stars strong , but is broken down later in the fight and is ko'd. Ali Ko 11

Marciano vs Holyfield -This would be a war. Holyfield wins a close but decisive decision . Holyfield UD

Holmes vs Louis - Finally Holmes would get more respect if he won this type of fight. Holmes UD

Vitali vs Fraizer - Vitali would be too much for Fraizer- Vitali Ko 7

Lewis vs Foreman- Foreman could Ko Lewis. But I really think Lewis wins a decision . Lewis UD

Liston vs Wlad- If Liston catches Wlad , he ko's him , but I honestly think Wlad wins by ko. Wlad Ko 10

Johnson vs Patterson -This would be a close fight, and most likely goes the distance. Johnson SD

Bowe vs Dempsey- Bowe would simply be too big .But i think Dempsey would go the distance. BoweUD

Roy Jones vs Haye- the Jones that fought Ruiz would outbox and outsmart Haye. Jones Jr UD

Tua vs Arreola- Tua more durable than Arreola - Tua KO 10

your thoughts ? And who do you think would win these fights?