The American signed for Chelsea in January in a £58million deal but was loaned straight back to Borussia Dortmund until the end of last season.
Christian Pulisic rejected a move to Manchester United as he did not want to play under Jose Mourinho, according to his former coach.
At just 20, Pulisic has made a bright start to his Blues career and looks likely to play an important role under Frank Lampard.
But it turns out the attacker could have signed for the Red Devils before his Stamford Bridge switch, according to The Telegraph.
‘LONDON IS WHERE IT IS AT’
Robin Walker coached Pulisic as a youngster at non-League side Brackley Town and made the stunning revelation.
He said: “I’m a Chelsea fan, I grew up in London supporting them.
“When I was in Dortmund last year, I told him that he had to come.
“He wouldn’t go to Manchester United because of Jose Mourinho.
“His father couldn’t stand Mourinho because he didn’t promote young players.
“It was at that point I asked, ‘What about London? That’s where it’s at.’
“I was trying to sell the city. His agent agreed, saying, ‘When you make these decisions, it’s all about investment and property’.
“I was delighted that he did sign.”