Moyes had revealed in 2018 that Kroos was close to joining him at Old Trafford before he lost his job in April 2014.
Sky Sports reveal that after Moyes' sacking, Kroos did not receive an update from United about their plans with the club's new manager at the time, Louis van Gaal, yet to take up his new role because he was in charge of the Netherlands for the 2014 World Cup.
And then, once the tournament began, Carlo Ancelotti, head coach of Real Madrid at the time, swooped in to secure Kroos' signature from Bayern Munich.
"David Moyes had come to see me and the contract had basically been done but then Moyes was fired and Louis van Gaal came in, which complicated matters," Kroos told The Athletic.
"David Moyes had come to see me and the contract had basically been done but then Moyes was fired..." 😬— Sky Sports Premier League (@SkySportsPL) February 25, 2020
He continued, "Louis wanted time to build his own project. I didn't hear anything from United for a while and started having doubts. Then the World Cup started and Carlo Ancelotti called. And that was it."
Another sensational revelation made by Kroos is that United were not the only Premier League club to make contact with him in 2014.
Former Liverpool captain Steven Gerrard and Luis Suarez texted the midfielder to convince him to join them at Anfield. Kroos said, "It wasn't a straight chat-up line but they offered to tell me more about the club and so on. The funny thing was, Suarez was about to leave to Barcelona anyway."