In the 18th minute, City won a penalty as Carlos Tevez was pulled down by JosHooiveld, but Spain World Cup star David Silva saw his weak effort saved by Kelvin Davis.
The arrival of the trio on the final day of the transfer window comes after the signing of FC Seoul's Ki Sung-Yong, Thomas Rogne from Stabaek, Brondby's Morten Rasmussen and JosHooiveld from AIK Stockholm.
Celtic boss Neil Lennon has recalled Stephen McManus from Middlesbrough and, if Campbell did sign for Celtic, he would join Dutch pair Glenn Loovens and JosHooiveld, Norwegian Thomas Rogne and Irishman Darren O'Dea in competing for a starting place.