One man's loss is another man's game. Well, in this case it's one team's loss is another team's gain.
Chelsea lost Romelu Lukaku and Everton have certainly gained him, but why oh why didn't Jose Mourinho see just how good the Belgian striker is?
Looking back at the timescale of Lukaku, it's stunning that the Blues allowed the striker to leave permanently at the age of 22.
The Belgian enjoyed a fruitful loan spell at The Hawthorns in the 2012/2013 season, scoring 17 league goals for a relatively poor Baggies side. He then spent the following season on loan at Goodison Park with Everton, scoring a further 15 league goals.
This was before he turned 22-years-old.
It's visibly clear he has the power, he has the pace and he has the natural finishing ability, but yet, after returning to Chelsea, he was told he wasn't needed and wasn't ready for first-team football.
Mourinho decides to sell
Mourinho agreed to sell the Belgian permanently to Everton for £28million, which in this day and age is fairly cheap, especially for a natural goalscorer at the age of just 22.
Mourinho defended his decision to sell Lukaku; he said his attitude wasn't good and he wasn't ready for the first-team, however, those comments came during a time of Chelsea boasted the likes of Samuel Eto'o, Demba Ba and Fernando Torres as their striking options.
He's easily better than all of them.
Funnily enough, when Mourinho was sacked for the second time, officials from Chelsea asked why he sold Lukaku.
It's well documented Roman Abramovich didn't want to lose Lukaku, but Mourinho allegedly went against it and sold him anyway.
Returns to Haunt Them
Since being sold to Everton, Lukaku failed to score against his former employers, that was until Saturday night in the FA Cup.
A brace from the Belgian - one of which was a sensational individual effort - eliminated Chelsea from the cup and all-but ended their season in March.
His two goals last weekend takes his career total of club goals up to 119. I repeat - he's just 22.
Chelsea's loss is Everton's gain.