Arsenal entered the post-Alexis Sanchez era with an impressive victory over Chelsea on Wednesday night.

The Gunners booked themselves a place in the Carabao Cup final with a gritty performance over their London rivals with Antonio Rudiger putting through his own net and Granit Xhaka stabbing home the winner.

It was a game of two halves for Arsene Wenger's men who were lucky to enter the break at 1-1 with one of the most bizarre goals of the season cancelling out Eden Hazard's early strike.

The Frenchman has been known to hesitate over tactical decisions in big games, often proving reluctant to change formations or make substitutions before the hour mark.

That wasn't the case on Wednesday, however, with Wenger switching to a more offensive line-up in the second half as he ground down Antonio Conte's complacent side.

Tactical analysis of Arsenal 2-1 Chelsea

And via YouTuber 'Nouman', who specialises in tactical analysis of top fixtures and players, the ins and outs of Wenger's tactical 'masterstroke' have never been clearer.

After the break, Wenger sought to expose the 5-4-1 formation that Chelsea had sat into after taking the lead with Hazard becoming isolated as a false nine.

Arsenal made the decision to move from a 5-3-2 line-up to a more offensive 3-5-2 version with Mohamed Elneny slotting into a back three, Nacho Monreal switching out wide and Alex Iwobi being given more freedom higher up the pitch.

Vital to all this was the aforementioned Elneny who emerged as something of an unsung hero in Wenger's tactics despite a poor run of performances this season. In fact, the video even heralded the Egyptian midfielder as Arsenal's best player on the night.

Arsenal's unsung hero

The 25-year-old provided protection for the back three and man-marked Hazard whenever he dropped deep to link up with the midfield. Elneny was seen constantly keeping tabs on the Belgian through the match.

Furthermore, Elneny would asign Hazard to an appropriate centre-back whenever he pushed forward and was only let down by Shokdran Mustafi for the opening goal.

And when asked to drop into centre-back for the second-half, the Egyptian kept a clean sheet for the Gunners and indirectly enhanced their attacking play.

It's certainly food for thought for both Arsenal fans and Wenger with Elneny's future hanging in doubt over recent months and a move to Leicester City coming close in the summer.

Deployed correctly, however, it's clear that Elneny has a role to play at the Emirates and even Hazard is an assailable challenge with the appropriate back-up.

Do you think Mohamed Elneny deserves more game-time at Arsenal? Have your say in the comments section below.