Romelu Lukaku's first Manchester Derby was one he won't forget, but not for the right reasons.

The Belgian striker was involved in both goals scored by the current Premier League leaders, especially in the second one, as an attempt to clear the ball from his box ended up finding the back of his team's net. Lukaku's clearance struck one of his team-mates, leaving the ball loose for Otamendi to score.

Added to that, his performance in front of goal was quite appalling, as he missed a couple of chances to score. One of those came during the final minutes of the game, but Lukaku failed to find the back of the net and struck Ederson's neck instead.

Here's how fans are venting their frustration after losing against their bitter rivals.

Lukaku needs the Mkhitaryan treatment. Start Martial or Zlatan up front next few games.

— SCHOLES (@iamscholes) December 10, 2017

Romelu Lukaku don win Man Of The Match for Man City.#ManchesterDerby pic.twitter.com/w0rXxSKeju

— Man United In Pidgin (@ManUtdInPidgin) December 10, 2017

Lukaku was absolutely terrible today, can't hold the ball up, can't score from a point blank range, can't outmuscle defenders. Needs to be dropped. Unbelievably terrible performance. #mufc

— Red Devil Army (@wickedchandy) December 10, 2017

Lukaku vs Top 6 teams in the Premier League:

Manchester City (0 goals + 2 assist and missed one sitter from 3 yards)

Chelsea (0 goals + 0 assist)

Arsenal (0 goals + 0 assist)

Spurs (0 goals + 0assist)

Liverpool (0 goal + 0 assist)

Most overrated striker in the league. pic.twitter.com/EUvIBOjTtq

— ConteTweets (@ConteTweetss) December 10, 2017

RT GeniusFootball: Live scenes of Man United players and Lukaku in the dressing room pic.twitter.com/9kz53axpp3

— AccumulatorON (@AccumulatorOn) December 10, 2017

I am not going to lambast anybody apart from Lukaku today because face it son, if the club pays such a high fee, people expect you to slot it in from 3 yards.

— The United Link (@TheUnitedLink) December 10, 2017

Contributions in big games:
Lacazette: 2 goals against Manchester United and City
Morata: 1 goal against Manchester United
Lukaku: 2 assists against Manchester United.

Big game players.

— DADDY THE FATHER (@SemilooreAkoni) December 10, 2017

Romelu Lukaku had his chances today and messed all of them up. Not what you expect from a £75m striker. José Mourinho needs to drop him now. Not good enough.

— Liam Canning (@LiamPaulCanning) December 10, 2017