Jose Mourinho didn't just join Manchester United today, he also joined Instagram with a brilliant first (and so far only) post - of his United contract.

He quickly amassed 100,000 followers in an hour.

"Manchester United Football Club, Old Trafford, The Theatre Of Dreams," read the caption.

Mourinho timeline - How the Special One made it to Manchester United

United appointed the Portuguese as manager on a three-year contract with an option to stay on until at least 2020, the Premier League club said on Friday.

The 53-year-old Portuguese replaces Dutchman Louis van Gaal whose two-year reign at Old Trafford ended on Monday when he was sacked two days after United won the FA Cup.

"Jose is quite simply the best manager in the game today. He has won trophies and inspired players in countries across Europe and, of course, he knows the Premier League very well, having won three titles here," United executive vice-chairman Ed Woodward said in a statement.

Jose Mourinho's Manchester United hit list Show all 9 1 /9 Jose Mourinho's Manchester United hit list Jose Mourinho's Manchester United hit list Juan Mata The Spaniard perhaps has most to worry about from Mourinho’s appointment, having been sold to United by the Portuguese in 2014, but while Mata lacks the pace and physical strength to become a key man under Mourinho, his knack of scoring goals in big games may yet play in his favour.

Survival rating: 6/10 Getty Jose Mourinho's Manchester United hit list Marcos Rojo The Argentine defender has endured an injury-hit time at Old Trafford since arriving from Sporting Lisbon two years ago. While Rojo possesses the physical attributes of a typical Mourinho defender, his poor concentration ensures his days will be numbered.

Survival rating: 3/10 Getty Jose Mourinho's Manchester United hit list Ander Herrera The £28.8m midfielder is under threat with Mourinho because he lacks a defined role and has struggled to make an impact during two seasons at United. Does not do enough to influence games and could be offloaded this summer.

Survival rating: 4/10 Getty Jose Mourinho's Manchester United hit list Daley Blind The Dutch defender became a key man under Louis van Gaal, impressing at centre-half last season having also played in midfield and at full-back. Blind may lose his centre-back position under Mourinho, but his versatility will earn him a stay of execution.

Survival rating: 8/10 Getty Jose Mourinho's Manchester United hit list Phil Jones Once regarded as a future England centre-half, but Jones has endured an injury nightmare at Old Trafford. But Mourinho likes to build his teams around a core of domestic players and Jones may yet be given the chance to prove himself for that reason.

Survival rating: 6/10 Getty Jose Mourinho's Manchester United hit list Bastian Schweinsteiger The Germany captain was a major disappointment last season having arrived to great fanfare from Bayern Munich. A Van Gaal loyalist, Schweinsteiger may find life too demanding under Mourinho and he appears an obvious candidate to be moved on.

Survival rating: 2/10 Getty Jose Mourinho's Manchester United hit list Marouane Fellaini Fellaini divides opinion at Old Trafford, with many regarding the Belgian as typifying the worst of Van Gaal’s reign, but he is effective and Mourinho is likely to regarded the former Everton midfielder as a useful Plan B, particularly with his physical presence.

Survival rating: 7/10 Reuters Jose Mourinho's Manchester United hit list Memphis Depay Mourinho turned Arjen Robben into a star during his first spell at Chelsea and Depay arrived at United with a reputation as Holland’s successor to the Bayern Munich winger. He had a disastrous first season, though, and needs to improve his attitude to survive under Mourinho.

Survival rating: 5/10 Getty Jose Mourinho's Manchester United hit list Adnan Januzaj Januzaj became a forgotten man under Van Gaal, but United still believe the Belgian can become a world-class talent. He will be forced to accept Mourinho’s tough approach, but it worked for Joe Cole at Chelsea and Januzaj could yet salvage his United career under the Special One.

Survival rating: 6/10 Getty