In the second half of the 0-0 draw at Elland Road, the pair got into a scuffle on the field.
Harry Maguire and Fred's on-field spat after Manchester United's goalless draw with Leeds, according to Ole Gunnar Solskjaer, stemmed from the players asking the utmost from one another.
In the second half at Elland Road, the pair could be heard having an expletive-laced rant about what seemed to be placement.
But, after the game, Solskjaer said it was all part of his players' mindset, which is to always aim for the highest.
"We have got a group that demands a lot of each other. The standard is high, both on training and in a game, it is not just about being a nice guy.
"We demand maximum effort. I was really proud of how strong we looked. I never thought they threatened our goal in the second half but we missed a little bit of spark to win the game."
It seemed like Maguire dubbed Fred a 'f*cking fool' from the Elland Road stands. After the game, the United captain was interviewed by Sky Sports, but he did not mention the incident in the second half.
The 28-year-old center-back said:
"It was tight. We had control of the game without punishing them. We knew how they would play, our attacking players love a one v one but today it wasn't to be.
"We kept them to a minimum, we were solid. We just couldn't find that edge. The intensity was there, both teams were trying to play the right way.
"Bruno Fernandes had the best chance of the game and on another day he puts it in the back of the net and we take the points.
"It's a big week for us."
Notwithstanding losing points to Leeds, the Red Devils boss was pleased with his team's success as they continued their undefeated streak in thePremier League
ompared to last season we have won more tight games, we have won more towards the end of games," Solskjaer said. "I think our fitness has been really good and second half we looked strong, athletes, I really liked what I saw.
"Today we just didn't have the moment, didn't take them when we had them. A draw is disappointing because we wanted to put pressure on City."