The West Yorkshire outfit returned to winning ways in the Championship with a comfortable 3-0 victory over City away from home at the Ashton Gate Stadium.
Samuel Saiz put the visiting side in the lead in the fourth minute and doubled the advantage on 14 minutes.
Pierre-Michel Lasogga wrapped up the scoring with Leeds’s third midway through the second half.
Both City and Leeds ended the game with 10 men, with Matty Taylor sent off for the home team and Gaetano Berardi dismissed for the Whites.
Leeds chairman Radrizzani has thanked the fans for their support against City on Twitter, although he has a message for one particular supporter.
The Italian businessman also seems to have been impressed with the performance of midfielder Ronaldo Vieira.
The 19-year-old midfielder was the star of the show for the Whites and was arguably the best player on the pitch.