Harry Kane's 99th Premier League goal saw us come from 1-0 down, but we couldn't push on to find a winner at a rain-drenched St Mary's on Sunday.
Davinson Sanchez accidentally converted Ryan Bertrand's dangerous cross at the near post as Southampton started brightly, but their lead lasted only three minutes as Kane headed home from a corner with 18 on the watch.
Eric Dier had hit the post in between goals but while Moussa Sissoko and Jack Stephens were off-target before half-time, the potentially-decisive chances didn't come until the closing moments of the game.
Young debutant striker Michael Obafemi couldn't connect in front of goal and fellow substitute Sofiane Boufal's shot was heroically blocked six yards out by Sanchez for Southampton before Kane found himself as the spare man as we worked the ball across the 18-yard line and into the box from right to left on 89 minutes, but his left-footed drive arrowed across the face of goal and wide with Victor Wanyama and Erik Lamela arriving just too late.
It meant a share of the spoils on the south coast with some tired legs at the end after an energy-sapping contest in the rain.