Kevin Blackwell believes Darius Henderson is thriving as the Blades' main striker after the January sale of James Beattie.

"He's got a massive role," said the Bramall Lane boss after seeing his summer signing net twice against Derby County.

"He holds the ball up, he's a real threat and it was always going to be a very difficult job to fill Beattie's boots.

"He looked a real threat today."