United had already scouted Dembele for Lyon's Cup win at Nantes on the weekend, says Foot Mercato.
Asked about the interest last night, Dembele declared: "It's sure to be flattering. It means that I produce good football on the field. Then it's up to me to stay focused and ignore it.
"I am a player of Olympique Lyonnais and I intend to stay until the end of the season.
“It's up to me to stay focused on football. There are people around me who are there for that. I take care of the pitch. I ignore (being scouted) because it is not something new. Since I was 14-15 years old, I am often scouted. So I ignore all that and I stay focused on the field."