Luis Enrique
The current Barcelona manager has already announced he will be leaving the club at the end of the season. In three seasons at the Camp Nou he has won practically everything. Now, he will have to decide whether to have a break or take charge of a different, less ambitious, project.
Arsene Wenger
One thinks of Wenger as Mr. Arsenal; it is hard to remember a time in which Arsenal were not lead by the Frenchman. He has, in fact, spent over 20 years in North London, but it has looked for the last couple of years like he is ready for a break. Many potential substitutes have been cited.
Diego Simeone
The Argentine manager has always looked like a flight risk. He arrived at Atletico Madrid in 2011 and has since created a solid and competitive style of football, which has allowed Atletico to reach two Champions League finals and win a League title. The time to hand down his legacy may be imminent.
Massimiliano Allegri
Having managed AC Milan, the Italian signed for Juventus in 2014. He is unwilling to talk about his future, despite being strongly linked with Arsenal. He has won two 'Scudettos' with Juve, but missed out on the Champions League, after being beaten by Barcelona in 2015.
Jorge Sampaoli
He has been at Sevilla for less than a year, but speculation over his future has grown over the last few months. He is one of Barcelona's prefered options. His teams are defined by their character and good football which is hard to compete against. Sevilla will want to keep him.
Stefano Pioli
Stefano Pioli succeeded at Lazio, which earned him a move to Inter. The Italian giants were in poor form and Pioli was brought in to make amends. He has managed to put Inter back on track but, with Chinese investors Suning taking over the club, his continuity is arguable to say the least.