What a week for Liverpool Football Club.
On Tuesday, Jurgen Klopp’s side knew they needed to beat Napoli to stand any chance of qualifying for the last-16 of the Champions League.
They did just that with a nervy 1-0 victory.
Then, five days later, they welcomed arch-rivals Manchester United to Anfield.
But it almost a nightmare start for the home side.
After just four minutes, Ashley Young whipped in a free-kick which evaded everyone and landed inside the far post.
However, Romelu Lukaku was clearly stood in an offside position and attempted to play the ball and, therefore, interfering with the play.
The assistant referee raised his flag and the goal was rightly chalked off.
However, replays showed exactly why Lukaku was stood in a clear offside position.
Before Young swung in the free-kick, Sadio Mane gave Lukaku a big push into an offside position.
WATCH: MANE PUSHED LUKAKU INTO OFFSIDE POSITION
Take a look:
LIVERPOOL FANS LOVED IT
That’s one way to catch opponents offside - and Liverpool fans thoroughly enjoyed it:
Twenty minutes later, Mane was involved once again.
This time, he was putting Liverpool 1-0 ahead.
Fabinho’s brilliant chipped ball found Mane who chested it down and firing it past David de Gea.
United may have equalised before half-time through Jesse Lingard but two deflected goals from substitute Xherdan Shaqiri completed a perfect week for Liverpool.
Liverpool are now back ahead of Manchester City by one point and have an opportunity to go four points clear when they face Wolves on Friday night.
As for United, they're now 19 points behind Liverpool and find themselves 11 points behind Chelsea in fourth.