Chelsea pair Kai Havertz and Timo Werner were on target in the club’s 3-3 Premier League draw with Southampton on Saturday.
And the pair have disagreed after the club’s Premier League draw.
The Blues looked to have won the match when Havertz slotted in with 30 minutes left on the clock but, in stoppage time, Vestergaard found the net to earn the Saints a point.
Afterwards, Werner blamed the Blues’ defence for letting the lead slip.
The former RB Leipzig star said: “I don’t know if we have a problem but in the end the last three games we concede six goals and that’s not where we want to be.”
Yet Havertz has insisted Chelsea must accept responsibility collectively, telling the club’s official website: “We have to take responsibility for that.
“We have 11 players on the pitch and everybody has to work hard so we don’t concede goals like this.
“It’s not always one person who makes the mistake so we have to look at our mistakes and try to solve the problems.”
Havertz admitted he would have liked his goal to be the winner for Chelsea, adding: “It would have been great if it was the winner.
“Of course, I’m happy with that but very frustrated too about the result.”
On being frustrated, the Germany international said: “We’re very frustrated about the result.
“We had 42 good minutes in the first half but then I made a mistake and we conceded a goal, which changed the game a little bit.”
Chelsea are next in action against Sevilla in the Champions League on Tuesday night (8pm).