The player had been expected to join Chelsea but, with negotiations dragging on, United made a surprise move on Monday.
And on Friday morning, Bakayoko added fuel to the flames by tweeting a good morning message to fans with his location set to Manchester.
The 22-year-old underwent keyhole surgery to clean out one of his knees at the end of the French domestic season and is in rehabilitation.
Today, Nemanja Matic is trying to push through a move to Man Utd...
Chelsea however, are open to Matic leaving the country instead of signing to a direct rival, not excluding United.
Chelsea had earlier announced the signing of German youngster Antonio Rudiger from Roma.
The 47-year-old Italian, who along with his coaching staff are yet to sign new contracts offered at the end of last term, is hoping to conclude deals for Juventus' Alex Sandro and Spanish worldwide striker Alvaro Morata from Real Madrid. There were strong indications last week that the Brazilian left-back was contemplating a move to the Bridge but it's now being claimed that "he wants to stay in Italy".