Vieira's Elite Development Side are currently on a 10-day pre-season training camp in Novigrad and they demanded that a match against HNK Rijeka was postponed after an opposing player allegedly racially insulted Fofana, a 19-year-old Frenchman.
A club statement read: "Manchester City's EDS U21 game with HNK Rijeka has today been cancelled due to an alleged incident of racial abuse toward the club's young midfielder Seko Fofana by a member of the opposing team.
"Following an alleged incident in the latter stages of the first half of the game, being played in Novigrad, Croatia, a decision was taken by the management staff to withdraw the City team from the field of play and cancel the game.
"Club representatives in Croatia and in Manchester are liaising with officials, the match organisers and the Croatian Football Association to pursue this matter further."
HNK Rijeka have distanced themselves from racism. A statement on their website read: "Manchester City coach Patrick Vieira entered the field, something was discussed with the referee, and then to the amazement of a well-filled stadium he took his team off the pitch. What are the reasons? They are known only to him."
