The Faroe Islands keeper, 24, needed 15 minutes of treatment and was taken off with his leg in a protective cast and taking oxygen.
Shay Given underwent surgery on his shoulder yesterday and City are recalling David Gonzalez from his loan at Leeds.
Broken dreams: Nielsen's injury is yet another headache for City
City, meanwhile, are poised to sign Ghanaian right-back Razak Nuhu, 20, from the country's Right to Dream academy. He is on loan at Norwegian club Stromsgodset. Manchester City boss Mancini fears talent pool at Eastlands is drying upMaine Road to Middle East(lands). Ex-Man City player transfers to RAF Competition: Win tickets to see Manchester City v Fulham on February 27 - courtesy of BarclaysAll the latest Manchester City news, features and opinion
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