Who was the underdog? Muhammad Ali or george foreman when they fought?

When Muhammad Ali Fought George Foreman he was definitely the underdog some were saying that Ali will be Lucky to get out of this fight alive, after the fight the excuses for Foreman started to immediately come out some said that Ali purposely had the ropes made loose so he could use them -'rope a dope' others say that Muhammad just winged it and upon seeing Foreman completely exhausted and worn out capitalized on the situation in the 8th round-either way anyone looks at it 'Big' George was the heavy favorite to keep his then undefeated record along with the heavyweight championship the night they fought.....