Mason Mount's penalty earned Chelsea a 1-1 draw at Southampton as Thomas Tuchel's Blues failed to turn possession into three points at St Mary's Stadium.
Takumi Minamino's fine finish put Southampton ahead at the break and Ralph Hasenhuttl's men held on for a morale-boosting point that ended a six-game losing run.
Chelsea striker Tammy Abraham was withdrawn at half-time with another ankle problem, while N'Golo Kante was perhaps lucky to escape a red card for an apparent stamp on Moussa Djenepo.
Callum Hudson-Odoi replaced Abraham at the interval for Chelsea, but was later hauled off himself, with Jorginho and Hakim Ziyech pitched into action late on.
Chelsea dominated from the get-go, hogging possession and territory but the visitors were unable to make anything pay.
Just when Chelsea expected to press on to reflect their dominance on the scoreboard however, up popped Saints with a devastating counter-attack.
Redmond's inch-perfect through-ball found the Japan forward who trickery then left Cesar Azpilicueta and Edouard Mendy on their backsides before scoring.
The equaliser came when Mount was felled in the box by Danny Ings and he got up to convert the spot kick in the 54th minute.
