Witsel has been linked with a £15million summer move to the club, but is also wanted by Real Madrid and Valencia, according to the Sun.
The 19-year-old said: “I found out recently about United’s interest but I don’t know much.
“As for my future we will have a meeting with the board at the end of the season.
“I’ll take my decision with the help of my father and my agent.
“I love the English, the Spanish and the French leagues. It will all depend on the offers.
“Arsenal, Feyenoord and Real wanted to sign me when I took part in the European Under-17s Championships in 2006. But I wanted to stay close to my family.”