Arsenal have long rued the decision not to give Carlos Vela more of a chance at the club.
The Mexican forward left for San Sebastian in 2012, completing a permanent deal after a year on loan with the club.
And he didn’t disappoint, with 14 goals and 12 assists in his 38 appearances for the club.
This season has also been impressive - the 25-year-old scoring 15 goals and assisting 11 - he is certainly a player Arsenal wish they had.
But when they let him go they knew of his potential - and were keen to ensure they could bring him back one day in the future.
So they inserted a buy-back clause in his deal worth €4 million so if the day ever came that they realised their error - they could snap him right back up.
The problem has however been Vela. A little over a year ago to the day he said this about a potential Emirates return:
"It could happen at any time, but I don't want to think about it. My life is here, and it's wearing this shirt that I want to discover European football next year."
That was one of many occasions he made it clear he had no desire to return to Arsenal - but could it be his views have thawed on a potential North London reunion?
It certainly seems that way according to comments he made on Radio Marca, reported by Inside Spanish Football:
“I’ve always said that I’m very happy and settled here, but we’ll have to see if there’s an agreement reached or not…I’m in a place where I’m happy and at the moment, don’t have any intentions of moving on, but if the time comes to leave, I think I’m prepared to try other things. I’ve not closed my mind to anything. Arsenal can come back for me at €4 million at any time, which is €1 million more than Real Sociedad paid. I look at things differently these days and I won’t close the door on Arsenal, or any team in England. I think I’m better prepared to play in another country now.”
Quite a turnaround for the player - and Arsenal would surely consider having him back.
He has a release clause of €30 million at the Anoeta - making the price Arsenal would need to pay an absolute bargain.
He also offers options up front - he play out wide or through the middle and in the last two seasons has directly contributed to 52 goals in his last 72 games for Sociedad.
Those sort of statistics cannot be ignored.
Chelsea were recently humbled to bring back Nemanja Matic for a much bigger fee and are thankful they did.
Perhaps Arsenal should consider doing the same.