Sleepytime 's dam , Alidiva , who was probably the best horse sired by Chief Singer , won at Listed level .
Was a half - sister to the Prix d'Ispahan winner Croco Rouge .
Sleepytime 's dam , Alidiva , who was probably the best horse sired by Chief Singer , won at Listed level and was a half - sister to the Prix d'Ispahan winner Croco Rouge .