Stephen Robinson felt St Mirren shot themselves in the foot after missing enough chances to put “five or six” past Hearts.
The Buddies were on top for the majority of Saturday’s crucial game, with Curtis Main and Thierry Small in particular both spurning gilt-edged opportunities throughout the entertaining match.
Those misses proved costly when Lawrence Shankland slammed home an extra-time equaliser from the penalty spot after Josh Ginnelly’s earlier tap-in, with Robinson gutted his team missed the chance to close the gap further on European spot rivals Hearts and Hibs.