Manchester United midfielder believes a lack of aggression on their part cost them the Manchester derby after they lost 2-1 to rivals City on Saturday.
United’s 100% start to the season was extinguished by a masterful first half performance by City, with United only settling for a consolatory goal despite a second half fight back.
And Fellaini believes the loss can be attributed to their lack of aggression and their failure to win the second balls.
“The problem was we needed to be more aggressive to win the first and second balls but we didn’t. However, the attitude was better in the second half,” Fellaini was quoted by the Daily Mail.
“We didn’t have the aggression in the first half, but that doesn’t matter now. We have to focus on the next game and we have to win.”
He added: “Everyone is disappointed, which is normal after losing a derby, but this is the fourth game of the season and every team will lose games,” the Belgium midfielder said.
“We have to focus on the next game now and be ready.
“The first half was difficult, but we created chances as well and it could have been 2-2 at the end of the half, so I think that is not the problem.”
The clash with City was the first of six September matches, with the next being a Europa League clash with Feyenoord, before a Premier League trip to Watford and an EFL Cup clash at Northampton.
“We were always in Manchester City’s box causing trouble,” Fellaini told MUTV.
“But we did not hit the target enough so it is always going to be difficult to score. We have 34 more games, so we must win our next game.
“We have to recover quickly because we have a game on Thursday and Sunday.
“The season will be busy because of those (Europa League) fixtures and we must be ready for that.”