The Blues drew 3-3 at home against Southampton after a Jannick Vestergaard late strike gave the Saints an unexpected point.
With a draw, Chelsea missed the opportunity to go straight back to the Champions League places whereas Southampton climbed up to 11th.
Timo Werner finally looks settled as his brace helped Chelsea to take a two-nil lead at Stamford Bridge. But Ralph Hassenhutl’s men showed their resilience in the space of 13 minutes, either side of the halves, to equalize the scoreline.
Another fresh summer recruit was on the target for the Blues as Kai Havertz scored his first Premier League goal to increase Saints’ deficit.
The late goal by Vestergaard left Lampard furious. In his post-match interview, he said, “I certainly didn’t want to play brave football in the last moments of the game.”
“That was my message to them, that I wanted them to go longer and break the press. I don’t think the players did that enough.
“We tried to play too much and some of that is ingrained in the players that they want to try and play football. That’s certainly something I am not a big advocate of with high pressure, as something you can do is miss out on the pressure to get the ball high up the pitch and use the players at the other end of the pitch.
“That was probably my biggest disappointment that the players didn’t put into action.”
Chelsea now have a match against Sevilla in the Champions League on Tuesday and then the Blues travel to Old Trafford for the ‘match of the weekend’ against Man United. While Southampton host league leaders Everton.