The Football Association says it will contact Stoke captain Michael Duberry after he accused Leicester's Danny Tiatto of racially abusing Salif Diao. Duberry claims Tiatto made the comments during Stoke's 2-1 Championship loss at the Walkers Stadium on Tuesday.
But the FA cannot take any action unless an official complaint is lodged by the club or players concerned and Duberry has said he will not make one.
There has been no comment from Diao, Tiatto or Leicester.
FA spokesman Mark Hooper said: "Anyone with information in such incidents should bring them to our attention so that any appropriate disciplinary action can be taken."