The Borussia Dortmund star has long been linked with a move to the Premier League giants.
Smuda has also revealed that he expects Lukasz Piszczek, Kuba Blaszczykowski to move to new clubs.
“In my opinion, in a moment they will be gone from Borussia,” Smuda told Reuters.
“‘Lewy’ is going to Manchester United, Kuba also somewhere in England, Piszczek to Real (Madrid).
“They have a goal and they want to grow. I base the squad on them.”