Frank Lampard said his Chelsea side's second successive capitulation at home is nothing to do with the youthful nature of his side.
A fortnight after squandering a first-half lead against Leicester, the Blues blew a 2-0 half-time advantage against Sheffield United to be held to a 2-2 draw.
Tammy Abraham's first-half double had looked like giving Lampard a first home win in charge, but Callum Robinson's effort less than a minute after the restart and Kurt Zouma's 87th-minute own goal handed the Blades a deserved point.
Lampard, who has been forced to turn to youth this season owing to the club's transfer ban, named the youngest side in the club's Premier League history, with an average age of 24 years and 158 days.
He handed a first start to 21-year-old Fikayo Tomori and brought on 18-year-old midfielder Billy Gilmour for his first appearance.
But for all their youthful energy, their soft underbelly was exposed, though Lampard says the two are not related.
"I don't put that together and I couldn't care less that we had the youngest team in (Chelsea's) Premier League history," he said.
"It was a real plus last week. The fact that it is young today, I don't think it relates at all.
"The lack of concentration caused mistakes for the goals, but you defend as a team as much as attack.
