It only takes one big transfer to trigger several other transfers, so what if La Liga contenders Atletico Madrid cashed in on Diego Costa in the January transfer window and sold him to Premier League club Chelsea?
What could be the possible ramifications of that deal?
Don't hesitate to comment below with your thoughts.
Try and guess which Atletico Madrid centre-forward made the following statement, as per Mark Redding at The Guardian: "I have three more years on my contract and next season I am still going to be here. I am very happy both in Spain and at Atletico."
It was Jimmy Floyd Hasselbaink in March 2000.
Wait, didn't he join Chelsea that same year? Yep (Atleti going down sped up the process).
Atleti manager Diego Simeone won't want Diego Costa to leave, as the club are level on points with Barcelona in La Liga, but the club's management have a history of selling their most valuable assets: Christian Vieri, David de Gea, Radamel Falcao, Fernando Torres, Sergio Aguero, et al.
According to Oliver Kay and George Caulkin at The Times (subscription required), Atleti and Chelsea have begun talks over Costa's transfer: "Chelsea are firm favourites to sign the 25-year-old in a deal that could involve Thibault Courtois, their outstanding 21-year-old goalkeeper, joining Atletico on a permanent basis."
So you tend to believe it is a matter of when, not if, Costa leaves.
Say he leaves in this window, who could Atleti replace him with?
Manchester United manager David Moyes rates Danny Welbeck as a better player than Javier "Chicharito" Hernandez. With Wayne Rooney and Robin van Persie out, Welbeck has started every game in January, while Hernandez has been on the bench for every league contest. His only start came in the FA Cup defeat to Swansea.
Welbeck is on course for a career-defining season (currently United's second top goalscorer in the Premier League with eight goals, one behind Wayne Rooney), while Chicharito is just a super-sub.
In the scenario of Diego Costa leaving Atletico Madrid, Chicharito could be a replacement.
Last January, Greg Stobart at Goal.com linked Chicharito with a move to Atleti.
He is a Diego Simeone-type forward: a winning attitude, works hard without possession, all-round forward and an underrated passer.
In the hypothetical situation of Diego Costa signing with Chelsea and Chicharito replacing Costa at Atletico Madrid, here are the possible transfer ramifications.
If Atleti No. 9 Leo Baptistao impresses on loan at Real Betis, Diego Simeone could be inclined to pair him up with Chicharito. Now that would be a dynamic pairing.
But what about David Villa? He should consider emulating Raul's foray into the Bundesliga.