Sadler's Wells has been called one of the most influential sires of all times, especially based on his record in the English Classic Races. He is the sire of 12 English Classic winners, a number comparable with leading sires Stockwell and St Simon from the 19th century. His English Classic winners are: Salsabil (1000 Guineas, Oaks), Intrepidity (Oaks), Moonshell (Oaks), Entrepreneur (2000 Guineas), King of Kings (2000 Guineas), Imagine (Oaks), Galileo (Derby), Milan (St Leger), High Chaparral (Derby), Brian Boru (St Leger), Refuse to Bend (2000 Guineas) and Alexandrova (Oaks). In 2001, his daughters swept the top three positions in the Oaks. He also sired 14 winners of the Irish Classics. In 1999, his sons finished one-two-three in the Irish Derby.