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Chelsea blew a two-goal lead against Sheffield United at Stamford Bridge on Saturday to draw 2-2.
The Blues led 2-0 at halftime thanks to two Tammy Abraham goals but conceded twice in the second half to deny Frank Lampard a first home win.
The Blues are yet to keep a clean sheet this season but Lampard refused to blame the defence after the Blues conceded twice against Sheffield United.
Lampard said: “It’s not defence, it is conceding as a team. The lack of concentration and mistakes for the goals are moments, you defend as a team as much as attack as a team.
“We conceded because you switch off in a game that should be comfortably seen off at 2-0. That is no disrespect to Sheffield United, 2-0 is not the end of the story.
“I was clear with the players on that at half-time, this can either be 3-0 and nice, or a potential 2-2. Disappointing factor is the first goal more than anything, because it allowed it but we only have ourselves to look at as a group and not individually.”
Lampard opted to start Fikayo Tomori ahead of Andreas Christensen for the game against Sheffield United.
Asked if he was worried about Chelsea’s right defensive combination, Lampard said: “No I wouldn’t say I was worried about it. I am trying to work all over the team to get the right combinations.
“Rudiger is fit after the international break, gives me another choice. We can isolate goals and talk about centre-backs or whatever, it’s not, it’s the team. When we score goals, sometimes it’s because of the centre-back playing the ball quickly. I am not relating the centre-back issue.
“I trust the four centre-backs I have completely, we are just in a moment where obviously we need to stop conceding goals.”