The 23-year-old agreed a four-year contract after a medical on Wearside this morning.

Chopra, a former Newcastle striker, becomes manager Roy Keane's third summer signing after the capture of Greg Halford and Russell Anderson - for a total of £9million.

Chopra was the Coca-Cola Championship's second highest scorer last term with 22 goals in 42 matches.

Keane told the club's website www.safc.com: "I'm delighted that Michael has joined us.

"He's a natural goalscorer who will bring competition with our other quality strikers to the side.

"I'm very confident he will score goals for this football club."