Retiring Manchester United manager Sir Alex Ferguson has been worth £1 billion to the city of Manchester, according to experts.
A report in the Manchester Evening News claims that new figures suggest Ferguson's hugely successful stint as United boss has brought in a huge amount of money to the city of Manchester.
The 13 Premier League titles, two Champions Leagues and various FA Cups and League Cups have boosted United's income beyond all of their competitors.
And the report claims that wealth boom has had a positive impact on the city of Manchester as a whole - to the value of £1bn.
United's revenues have gone from £25.2m at the conclusion of the 1992/93 season to £335m following the end of the last campaign.
And over the last 13 years under Ferguson - from 2000 onwards - United have made £4.2bn, compared to Liverpool's £2.7bn.
During that same period Ferguson won seven Premier League titles, one FA Cup, three League Cups and one Champions League. Liverpool won two FA Cups, three League Cups and one Champions League.
Manchester-based think tank New Economy have calculated the Gross Value Added of that sustained success - the amount of money that flowed into the city of Manchester as a result of a successful business.
And the report claims United have contributed a £1.3bn boost to the local economy. For comparison, Liverpool have added £800m.
Ferguson's success in the Premier League has also acted as a hugely powerful advertising tool for the city. Estimates suggest United's global reach equates to roughly £1bn in advertising spend for the city of Manchester.
Mike Emmerich, chief executive of New Economy, told the Manchester Evening News: "When Sir Alex took over at Manchester United in 1986, the city was in many senses in the doldrums.
"The city had lost 160,000 manufacturing jobs in six years - the equivalent of 73 job losses per day - and more than 180,000 people were claiming unemployment benefit, double the current level.
"Today, in stark contrast, Manchester is once again a place of global success, both in sporting terms but far beyond that.
"It is not stretching a point to claim that the success Sir Alex Ferguson has built at Manchester United is one of the foundations on which the city's renewal has been built."