Martin O'Neill has spoken of his delight at securing the signature of Danny Graham.
The Sunderland boss made a deadline-day swoop to snare the striker, with the Black Cats paying Swansea a £5m fee to acquire his services.
Graham finished as City top scorer with 14 goals last season and added a further seven under Michael Laudrup during the current campaign.
"Danny will work hard for the team and did very well at Swansea, where he had a good season last year," O'Neill told safc.com.
"We're delighted to have Danny and I genuinely think he'll do well for us. He has a real desire to do well.
"I saw him from afar last season when he played very well in a system which seemed to suit him."
O'Neill targeted a striker as a priority and says his new signing has a vital role to play in taking the scoring load off 10-goal leading marksman Steven Fletcher.
"I think Danny can fit in and score a few goals for us," he said.
"We want to be less reliant on Steven Fletcher scoring the goals. I think Danny will alleviate the load; that's my expectation and I think he feels the same."
And O'Neill has dropped a hint that Fletcher and Graham may combine, although the Sunderland chief was keeping his cards close to his chest.
"I've got a fairly decent idea in my head about how we'll use Danny," he revealed.
"As the players get to know him and he gets to know them, there'll be a number of formations we'll be able to use."