It is pretty obvious that Derby securing loans from Chelsea for Mount and Tomori was due to Lampards connections to the club, but the former midfielder has proved it was not for kicks as his side have been impressive in the Championship so far.
Undaunted, Lampard's side levelled shortly before the half-hour through Martyn Waghorn before Cesc Fabregas restored order for the Premier League high-flyers.
Key Stat: Chelsea have conceded three goals in their past three matches across all competitions.
"Talking to the Chelsea players and some of their staff after the game, they were all praising us and saying how good we were", Lampard said. I turned round thinking we'd got the foul, then looked back and they were in our box. Mount also went close late on and the huge travelling support bounced with pride throughout the 90 minutes. "But most of the problems were created by them", the Chelsea assistant boss said.
Second tier Middlesbrough also reached the next round with a 1-0 win over Premier League Crystal Palace as manager Tony Pulis got one over his former club thanks to a thunderbolt finish from Lewis Wing.
"The difference today was inches".
"We really contributed to the night, this is a fantastic Chelsea team and we competed".
But Lampard is eager to see Hazard sit out Wednesday's clash at Stamford Bridge as he returns to west London as a manager for the first time.
After spending 13 years as a player at Chelsea, he explained it was humbling to return and paid tribute to both sets of supporters for the reception he received. "I'm so proud of my Derby County players". At first it wasn't showing, because he was very much involved learning tactically what the team needs him to do, but now he's getting that freedom is taking out all of his ability. Chelsea fans in the Matthew Harding upper and lower promptly replied with "Derby Derby, give us a goal". In a statement released last week, Chelsea admitted they thought the experience from the match would be beneficial to both Mount and Tomori's development at Derby. If we play like that we will win games.
"We can't accept that those standards don't remain".
Perhaps that was everything, but it was hard not to link Chelsea's fluctuating concentration levels with the fact that the focus of Stamford Bridge so often drifted to the visiting dugout.
'A lot was down to us.
Ruben Loftus-Cheek is now enjoying the best goalscoring spell of his career, netting in two consecutive games for the first time.
"It's important to see the two players playing to give us a good indication [of their level]".
We are predicting that the Blues team to face Derby will be one that is nearly unrecognisable from the one that battered Burnley 4-0 on Sunday.