The England striker has hit his stride at just the right time for the Gunners.
Louis van Gaal’s men were blown away by the pace and intensity of Arsenal’s start to the game and found themselves three goals down within 20 minutes.
Walcott was key in the Gunners execution of the high press and Coquelin feels the England striker has now proven his ability to lead the line.
“It was not only offensively (his best game) - what he did defensively was absolutely amazing too," said Coquelin, in quotes published by London24.
"He was chasing the ball, which makes things easier for us at the back."
“When he is in this kind of mood he is not far off being unstoppable, and he has shown everyone he can play in this role up front.”
The 26-year old has hit a purple patch of form for club and country and is producing some of the best football of his career to date.
His timely emergence comes as frustration with Olivier Giroud reaches an all time high, and there is now the sense that he can’t be relied on to make the difference in the biggest games.
Walcott meanwhile, is doing just that and his form bodes well for the national team too. Wayne Rooney and Harry Kane have both struggled for goals this season but if Walcott can maintain his form until next June, England's Euro 2016 opponents will have their work cut out trying to stop him.