The 24-year-old has scored five goals since his move from Brest in the January transfer window.
Roux said that he moved to the Stade Lille-Metropole to play in the Champions League and he now has one eye on that prize.
"It's true that this is the most attack-minded team in Ligue 1 and, for a striker, it is great to play for a team that is always attacking," Roux told Ligue1.com.
"Things like the Champions League and our new stadium were in the back of my mind as well. That is why I decided to come here."
Lille are currently third in Ligue 1, six-points clear of Lyon.