The Belgian has often been the centre of many fans' ire but the manager continues to have immense faith in the midfielder and after his brace against Palace, he continues to impress and repay the faith.
And Lukaku finally got his goal in the closing stages when good work from Jesse Lingard and Martial on the left allowed him to tap in the fourth goal of the afternoon for Manchester United and his eleventh for the season.
In the second half, Fellaini's early header made it 3-0, and United were happy to stand off and preserve their energy going into the international break at the very least joint-top of the league. Wilfried Zaha has returned to light training having not played since the opening day defeat to Huddersfield Town, but is not fit enough to feature.
Jones was a doubt before Saturday's match as he did not travel to Russia earlier this week but he'll be a strong back up after producing a strong performance in Moscow.
Lukaku was kept relatively quiet at Old Trafford until the 86th minute, when he tapped in for an 11th goal in 10 games for his new club.
Whatever the case is, Fellaini has been one of the team's best players of late. Liverpool are luckier than us, they play Tuesday and Sunday, we have to play on Wednesday and on Saturday at 3pm.
"We might find at the end of the season we look back on this terrible spell and say it was something that helped build the character we're looking for to stay in the league".