However, it appears any remaining obstacles have been overcome with the Telegraph stating that 20-year-old Roberts' move to Celtic should be done in the next 48 hours.
"I love it here and I'm thankful to be finally here".
The England youth global failed to feature under City boss Pep Guardiola in the early stages of the Premier League season, prompting his move back to Glasgow where he will be available to feature in the Champions League.
He started his career with Fulham and joined City for a fee of about £12m in 2015.
There's no denial that Roberts will record a much-more handsome goal tally playing north of the border, but his progression as a footballer could've been much steeper playing in the competitive and physical Premier League.
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"We had a good end to the season. which obviously helped, and playing for these great fans was also a factor in coming back".
"The manager has been brilliant with me".
Roberts wanted to make a strong impression for City this season, but Pep Guardiola felt it would be best for the youngster to move out on loan again. "I worked under him all of past year and I believe I can develop under him even more and become a better player".
"Celtic Park was rocking last year in the Champions League and I'm sure it will be the exact same this year".
The social media campaign for Celtic fans to convince Roberts to stay was something that ran all summer, and speaking to Celtic TV after confirming his return to the club, Roberts admitted that he had a heavy heart after leaving and the love of the fans was a big reason why he came back.
"Massive centre half issues were exposed against Astana and Patrick Roberts in these domestic and European games has that something special".