Albon was challenging Sainz's McLaren for eighth on lap three and dived down the inside into the Roggia chicane.
The bold move meant he lacked momentum out of the chicane and Sainz was able to draw back alongside.
Albon stayed to the outside into the Lesmos, where a brush between the two cars meant the Red Bull ran through the gravel and dropped to 11th.
"He went really deep into Turn 4 ...Keep reading
Read more: Sainz doesn't regret "hard" Albon move despite apology - Motorsport.com