Mourinho’s previous spell in Madrid, which began in 2010 and lasted three seasons, yielded a La Liga title, a Copa del Rey and a Spanish Super Cup.
He has since taken charge of Premier League clubs Chelsea, Manchester United and Tottenham Hotspur and had stints at Roma, Fenerbahce and Benfica.
During the only season of what was his second stint at Benfica, Mourinho led the two-time European Cup winners to an unbeaten Liga Portugal campaign, though it was only enough to secure a third-place finish.
Earlier this week, Benfica agreed a deal to appoint former Fulham manager Marco Silva as Mourinho’s replacement.
Mourinho, meanwhile, heads back to Real Madrid with the club having failed to win a trophy in the past two seasons.
They parted ways with Xabi Alonso in January before Alvaro Arbeloa led them through to the end of the campaign.
