The son of Invincible Spirit, owned by Mr A Merza and Khalifa Dasmal, has progressed with each start to date and had little trouble getting off the mark under James Doyle.
Although drawn poorly in one, Alizoom broke well and James soon tacked over to adopt an early lead on the rail.
He travelled well through the race and quickened clear to win unchallenged by three and three quarter lenghts.
Roger said: "He appreciated some cut underfoot and has done it nicely. He will be a fun horse for nurseries."