According to Jack Gaughan from the Daily Mail, the England international has been sporting the three stripes brand in his last three training sessions - with his contract with Nike nearing an end.
Sterling has become a hugely marketable figure in recent times thanks to his stellar form on the pitch, as well as raising awareness on important issues such as racism.
And it's said that quite the bidding war has begun for Sterling's endorsement going forward.
Nike still want the former Liverpool man to be tied to them but have a six-month window to match what Sterling is being offered elsewhere - with the likes of Puma and New Balance incredibly keen on securing his services.
Sterling could end up pocketing more than £10 million per season on top of his regular City pay packet with add-ons and performance-related bonuses factored in.
Puma want to make him a face of their brand, having previously signed up David Silva and manager Pep Guardiola after commencing a £650 million kit deal with four-time Premier League winners City.
It was reported in August, however, that Sterling was "considering" a historic £100 million offer to become the first player to wear Jordan brand boots.
The Jordan brand is a subsidiary of Nike and following its tie-in with basketball, successfully moved into football last year with its collaboration with French giants Paris Saint-Germain.
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