The former United midfielder explained that such was the competitiveness of the squad – which contained the likes of Wayne Rooney, Rio Ferdinand and Cristiano Ronaldo – that a training game the night before their victory over Chelsea nearly came to blows.
Much of the session took place in front of cameras, although the bust-up was not filmed.
When asked by beIN Sport how Ferguson fired up the players before that final, Hargreaves explained: “He didn’t need to, he knew the boys were ready.
“I remember we did a training game in the stadium in Moscow the day before and we almost had a fight amongst the two teams because the training game was so intense.
“One team lost and everybody was moaning at each other and Sir Alex had to come in and break it up. That’s how it was. Everybody was so competitive about winning.
“Even in a training game, you’d think people didn’t want to get injured but that wasn’t the case. Everybody was just on it. Everybody was so excited for that game.”