Bournemouth's Harry Arter misses a penalty shot during their English Premier League football match against Southampton on April 1, 2017Bournemouth's Harry Arter misses a penalty shot during their English Premier League football match against Southampton on April 1, 2017 (AFP Photo/Adrian DENNIS)
But Cherries midfielder Arter lost his footing as he ran up to take the spot-kick and blasted it into the fans behind Fraser Forster's goal.
Arter's howler meant a frenetic derby finished in a stalemate that did little for either team's hopes of climbing out of mid-table in the Premier League.
Southampton's Dusan Tadic had complained this week about the frequency with which Claude Puel substitutes him and his manager responded by telling him to do his talking on the pitch.
Inevitably, Tadic was gifted the game's first chance, but he wasn't able to prove his point.
Finding himself with time and space to run into at the edge of the area in the fourth minute, the Serbian midfielder could only send his left-footed shot well wide.
In the 78th minute, Bertrand was harshly penalised by Jonathan Moss as the referee ruled the Saints defender's tug on Fraser was worthy of a penalty.
The stage was set for a Bournemouth victory, but Arter slipped at the crucial moment, driving his shot into orbit and sending Howe into turf-thumping anguish on the touchline.