January is often a crazy period in the European football season, but while it is not always imperative to sign players in order to hit targets come May, it can be a wonderful opportunity to capitalise on positions that certain clubs find themselves in.
Clubs have the option of establishing themselves in positions that they did not envisage themselves being in at this point, so it is to the fans' dismay when clubs either refuse to gamble in the market or fail to push deals over the line.
As well as the following five sides, another team who may be a little disappointed by their business in January could be Liverpool—who look to fight off Everton, Spurs and Manchester United for that invaluable fourth spot.
Rodgers may regret not bringing in reinforcements, but if the squad stays healthy, they can achieve their target of fourth, which is why I do not think their lack of business in January will mean they will suffer over the coming months.
Of course, bad luck with injuries can change everything, but the majority of clubs cannot budget for this always.
Valencia is an intriguing team, who did multiple deals in the window, and while Los Che will have next to no chance of a place in the top four, they can still reach the Europa League spots.
Vinicius Araujo, Philippe Senderos, Seydou Keita, Ruben Vezo and Edu Vargas all arrived, so it is tough to say they have had a bad window.
All of those deals have doubts as to whether they will prove to be successes, at least in the short term.
So departures of Sergio Canales, Helder Postiga, Dorlan Pabon, Adil Rami, Ever Banega and Andres Guardado may yet prove costly.
Results have not been good enough, so you cannot blame the club for rolling the dice and making plenty of changes, but it remains to be seen whether so many will have a positive or negative effect.
Here are five other teams who could suffer after a poor January transfer window.