Ronaldo scored United's opening goal against Spurs and set Cavani up for the second goal.
Cristiano Ronaldo labelled Manchester United's all-round display against Tottenham Hotspur on Saturday evening as 'unbelievable'.
The Portuguese forward broke the deadlock just before half-time as he smashed in an over-the-top pass from his compatriot Bruno Fernandes.
Ronaldo also assisted striker Edinson Cavani who calmly found the net with a cool finish in the second half before substitute Marcus Rashford wrapped up the victory in north London.
"We knew before the game that we had a tough week [after] a result that we didn't expect," Ronaldo told Sky Sports.
"The team was a little bit under pressure, a little bit sad, but we knew that today we [could] give a good answer. We played good, we started the game very well.
"Of course my job is to help the team with my experience, my goals, my assists and I did that today and I feel so pleased with that. But in terms of the team, it was an unbelievable performance in my opinion."
The United no.7 added: "It was tough. We didn't expect the last result in the Premier League. But, you know, I hope this time we turn the page.
"I believe that some things happen for a reason and we have to be happy for this amazing afternoon. We have won 3-0 in an away stadium against a difficult team and we are so, so pleased for that."