He’s done it!
The Dutch striker, who signed from AZ Alkmaar for a whopping £17million, has failed to live up to his huge price tag at White Hart Lane.
But with Harry Kane picking up an injury early on in Tottenham’s quarter-final fixture, Janssen was presented with a chance to shine and, well, seized it with both hands.
With the game already won, the Dutchman buried a first-time shot past Millwall keeper Jordan Archer, finding the very corner of the goal with a great finish.
Spurs fans took to Twitter to congratulate the striker, hoping that this will now kick-start his career at the club.
While others took to the social media site to crack a joke… the same joke.
Can you guess what it is? Yep, got it in one!