The talented midfielder is seen as one of the brightest youngsters in Europe.
The 20-year-old is also being linked with Lyon, Ajax, Palermo, Middlesbrough and Aston Villa.
Defour’s agent Paul Stefani said in October: “Lyon and Arsenal have scouted Steven. They both have decided to come back to see him in other matches.”
Defour’s contract with Liege expires in 2013.