The former Gunners midfielder says his side's rivalry with United was stronger than it was with their north London neighbours.
The Frenchman made the claim when discussing Roy Keane, admitting that the Irishman had 'similar qualities' to himself as a player.
Vieira thus 'loved' to play against Keane, while also stating that Arsenal's rivalry with Man United was 'more' than it was with Tottenham.
“We had similar qualities as players,” the 38-year-old is quoted as saying by the Daily Mirror. “We were both determined, we wanted to win, and we were both leaders of our teams. That’s why I always loved to play against him.
“I got a call from ITV asking me if I wanted to do the documentary and I said ‘yes’, because I knew he would do it. despite the rivalry, there has always been respect between us.
“We challenged ourselves, we battled, but we always retained respect for each other.
“At that time, Arsenal were building up a great team to challenge United, who were up there already,. Maybe United and Roy weren’t used to that kind of challenge.
“Our rivalry at that time was more with United than it was with Tottenham."