The Spaniard's future has been the subject of much speculation in recent weeks following the announcement he will terminate his Bayern Munich contract at the end of the season.
And reports as per the Daily Mail now claim United executive vice chairman Ed Woodward is determined to make the in-demand Catalan the next manager at Old Trafford, should they choose to part ways with under-fire manager Louis van Gaal.
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The Dutchman has come in for heavy criticism recently following three consecutive league defeats to Bournemouth, Norwich City and Stoke City, which has seen them fall into sixth behind Tottenham and Crystal Palace in fourth and fifth respectively.
Van Gaal's style of play has also failed to win over both critics and fans, with many calling for a change in United's uninspiring, possession-based football.
Reports have recently reveiled Guardiola has told friends he will join City at the end of the season, though this depends upon how the club deal with current manager Manuel Pellegrini.
Having won the Premier League and League Cup in his first two seasons at the Citizens, the club's board might struggle to justify sacking the Chilean, especially if he secures further silverware this season.
Chelsea's chances of luring Guardiola to Stamford Bridge, on the other hand, seem heavily dependent on their ability to play their way back into a top four spot for next season's Champions League.
The former Barcelona manager has previously insisted he would be unwilling to take over a club where he would have to wait at least a year to manage in the Champions League.
Guardiola has remained reasonably quiet on where his future may lie, irrespective of what his friends might say, suggesting each of his suitors are still within a shot of luring him to their respective stadiums.