Ralf Rangnick confirmed that Chelsea approached him last season about taking over as interim manager before settling on Thomas Tuchel as Frank Lampard's permanent replacement.
Rangnick has since been hired on a temporary basis by Manchester United, taking over as head coach until the end of the season before moving into an advisory role for another two years.
After red tape forced him to watch United's victory over Arsenal from the stands on Thursday, he will finally be in the dugout for his new side's match against Crystal Palace.
Rangnick explained before that game why he turned down a Premier League move with Chelsea before being enticed to England by Manchester United's offer.
"When Chelsea contacted me last year, they only spoke about the option to become interim manager for four months, without any prospective to work in the long term together," he said.
"Now here we are talking about six-and-a-half months, so we only have one-third of the games played in the Premier League.
"We have also agreed on a two-year advisory role after those six-and-a-half months. In the end, to be honest, if a club like Manchester United contacts you for such a role you cannot possibly turn it down."
Rangnick joins Old Trafford with United trailing his previous suitors. The Red Devils are currently seventh in the Premier League, 12 points behind leaders Chelsea.
Ole Gunnar Solskjaer's final months were abysmal, with humiliating defeats to Leicester, Liverpool, and Manchester City, followed by a 4-1 thrashing at the hands of Watford, which ultimately cost him his job.
However, things have improved since then under caretaker manager Michael Carrick, who won two and drew one of his three games in charge before departing on Thursday.