Odion Ighalo was on parade for Manchester United in their fifth FA cup clash with championship side on Thursday.
The Nigerian started the game ahead of Anthony Martial and bagged a brace to help the club secured passage into the last eight of the competition.
Left back Luke Shaw gave United the lead after his volley defected off Jesse Lingard into back of the net.
Luke Shaw continued his dazzling from the left and played a sublime pass into the path of Ighalo who find his way past two Leeds United defender to slot home his first of the night.
Ighalo completed his brace later in the second half, when he blasted a shot past Roos left-footed after his first short was blocked.
Ighalo has now scored three goals for the club and will hope to add to his tally when Manchester United take on premier league champions Manchester City on Sunday.