Joe Davis was not able to focus with his right eye; he played with his cue to the left of his chin. Coach Frank Callan, in his book "Frank Callan's Snooker Clinic", compared the most successful player at the time, Steve Davis to Joe Davis and concluded Joe Davis was the better player. Callan also stated; "many players who tried to emulate Joe's stance (which was unusually off-centre due to left eye striking) simply gave up the game when they found they couldn't play like that".