Timo Werner has said he is only 50% happy - despite bagging his first two Premier League goals.
The striker bagged a brace as Chelsea went on to draw 3-3 with Southampton.
Another error from goalkeeper Kepa Arrizabalaga and a 93rd minute equaliser from Jannick Vestergaard ensured the home side would not take all three points.
Frustrations with how the team have performed defensively have ensured that Werner cannot celebrate his goals.
"The first half we played very well," Werner said following the game.
"When you get a goal two or three minutes before half-time it is not easy. You have to think with a clear head.
"Southampton make a lot of pressure on us and pressed us high. We gave them too much in terms of opportunities. We have to win the game.
"I am happy about the goals but I want to win the game. 50% I am happy, 50% not.
"I don't know if we have a problem but the last three games we concede six goals and it is not where we want to be, to compete for titles.
"In Germany we always say defence wins titles. If we concede so many it is hard to win games and win titles."
Chelsea had looked to be flying from Werner's goals in the first-half.
But Danny Ings produced a typical finish before Che Adams capitalised from a Kepa howler to make the scores 2-2.
Kai Havertz hit back, but Southampton's pressure paid off in stoppage time when Vestergaard headed home.