Dead Certain failed to reproduce her best form in her last two races. In the Haydock Sprint Cup on 8 September she started third favourite behind Dayjur and Royal Academy but refused to co-operate with her jockey Alan Munro, throwing her head in the air and finishing tailed-off last of the nine runners. In the Diadem Stakes three weeks later she ran well for half a mile but faded quickly and finished twelfth of the fourteen runners behind the French-trained colt Ron's Victory.
