Back in September 2015, Reading, then managed by Steve Clarke, took on Everton in the League Cup.
Unfortunately for the Royals, they came up against a Ross Barkley in impressive form. He scored along with Gerard Deulofeu to give a strong Everton side a 2-1 win.
But the one player from Reading who truly stood out in the game was young defender Jake Cooper.
He shackled Romelu Lukaku for 90 minutes in an incredible display which left the potent Belgian unable to have any impact.
That was supposed to be the start of something special for Cooper at Reading.
The local lad from Bracknell was tipped to be a starter for years to come at the Madejski Stadium.
However, that did not happen. Reading gave up on Cooper and another team are now reaping the benefit of that oversight.
That team is Millwall.
Cooper headed to Millwall on loan in January last year and helped guide the London club to League One promotion.
In the summer, Millwall completed his permanent signing for a fee reported by The Sun to be in the region of £400,000.
That is now looking like an absolute bargain.
Whilst Reading are flirting with relegation from the Championship, Millwall have taken everyone in the Championship by surprise.
Currently, Neil Harris’ men are 10th in the table and just four points off the top six.
Cooper has been an essential member of the Millwall side who have moved into such a strong position.
Conceding just 37 goals in 38 games, the Lions have one of the best defensive records in the league, whilst Reading’s is the fourth worst.
Cooper showed all the promise to become a top Championship defender whilst at Reading but the Royals decided he was not up to the task.
Millwall have undoubtedly enjoyed picking up on their divisional rival’s mistake.