Jose Mourinho returns to Chelsea on Sunday for the first time since he was sacked there in December last year.

The Portuguese was relieved of his duties just seven months after guiding the Blues to the Premier League title, although he left with the club having made one of the worst defences of a title in top-flight history.

Nonetheless, he takes his Manchester United team, fresh from a 4-1 win over Fenerbahce on Thursday, to Stamford Bridge on Sunday, looking to record a fifth Premier League victory of the season.

A win for United would take them above Antonio Conte’s Blues, who currently sit fifth in the league having won five of their first eight Premier League matches.

Both teams would have hoped to have built on their starts to the campaign, where both sides won their first three matches, yet a few disappointing defeats have hindered both Chelsea and United in their pursuit of the Premier League title.

Although Mourinho has been in the public eye for well over a decade, here are FIVE things that you probably didn’t know about the 53-year-old…

He was once a PE teacher

Mourinho first started out as a PE teacher in Lisbon.

He spent five years in the role across a number of schools in the Portuguese capital, in turn earning a diploma, before deciding that he wanted to go into coaching, which has turned out to be an inspired choice.

A former pupil recalls the effect Mourinho had when he arrived at one school, saying: ‘Until he arrived, no girls ever wanted to do PE. But suddenly, nobody was asking for a doctor’s sick note.’

He made it onto the cover of a Rolling Stone magazine

The United boss was named ‘Rockstar of the Year’ in 2011, and subsequently appeared on the front cover of the Spanish edition of the Rolling Stone magazine.

He received this award, one of a number of individual honours he has won in his career, as a result of his management style, especially in dealing with the media.

They said that the then-Real Madrid manager won the award because of his ‘controversial message’ and ‘provocative attitude’, both during and after a game.

The laundry bin saga

It has been reported that Mourinho attempted to beat a stadium ban while in charge of Chelsea in 2005, by hiding in a laundry basket.

The 53-year-old was given a two-game ban by UEFA for his behaviour in the Blues’ 5-4 aggregate victory over Barcelona in the last 16 of the Champions League, meaning that he wouldn’t be allowed to contact his players during the two-leg quarter-final tie against Bayern Munich.

However, it is alleged that Mourinho was wheeled into Stamford Bridge hidden in a laundry basket, which carried the team’s kit, to give the pre-match and half-time team talks.

He was then wheeled out of the ground 10 minutes before the end of the match, which incidentally Chelsea won 4-2, so no-one was any the wiser.

Nine-year unbeaten run

Many people in English football would be aware of Mourinho’s sensational home run while in charge of Chelsea, which saw him go unbeaten in the league at Stamford Bridge throughout his first stint at the club.

However, it turns out that this incredible unbeaten home record began while he was in charge of Porto in 2002, and went on all the way until 2011, when his Real Madrid side lost 1-0 at home to Sporting Gijon.

Nine years, 125 wins, 25 draws, and 107 coaches who couldn’t beat the ‘Special One’ at home in the league. Incredible!

He received a doctorate in 2009

The Portuguese boss received a doctorate in 2009 from Lisbon’s Technical University for his achievements in football.

The 53-year-old had graduated from the university two decades previous with a degree in physical education and sport, but was this time recognised for the excellent work he did at Porto, as well as his impressive spell at Chelsea.

He guided the Portuguese side to the Champions League title in 2004, and then moved to England where he won two consecutive Premier League titles at Stamford Bridge in 2005 and 2006.