Two weeks after the Derby, Tetratema was brought back to sprinting at Royal Ascot and won the Fern Hill Stakes by six lengths from the two-year-old Galway Castle. When tested over ten furlongs in the Eclipse Stakes however, he again failed to stay and finished unplaced behind the four-year-old Buchan, who won from Silvern and Allenby.
Two weeks after the Derby, Tetratema returned to sprinting at Royal Ascot and secured a decisive victory in the Fern Hill Stakes against Galway Castle. Nevertheless, when subjected to a longer distance test in the Eclipse Stakes, he was unable to keep pace with Buchan, who outperformed Silvern and Allenby.