Saints captain Jose Fonte was given his marching orders for a foul on Fabio Borini on the edge of the penalty area in the 79th minute.
• Southampton 1-1 Sunderland - match report >>
• Southampton 1-1 Sunderland - as it happened >>
Substitute Defoe stunned St Mary’s when he clipped his 14th goal of the season into the far corner, from Lamine Kone’s pass, in the 85th minute.
VIRGIL van Dijk rescued a point with a late, late goal after Jermain Defoe threatened to inflict a third successive defeat on ten-man Saints.
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