The 33-year-old forward joined United earlier this month on a free transfer from French Ligue 1 side Paris St Germain and will don the club’s iconic number seven jersey, worn in the past by Cristiano Ronaldo and David Beckham.
Rashford welcomed the competition the Uruguayan will provide to United’s front line that includes himself, Anthony Martial, Mason Greenwood, Daniel James and Odion Ighalo.
“As a forward line (the arrival of Cavani) is something to look forward to. Hopefully he comes in and scores goals, because he can definitely help us win games and points. He can be a massive player this season,” Rashford told Sky Sports.