"There were a couple of big moments at the end when Richard Keogh and David Nugent almost scored, but he'll be so proud of his team with the way they played and the way they passed the ball", Redknapp told Sky Sports.
"Chelsea fans, they'll open Frank with open arms, they're desperate to see him again".
That was the view of Chelsea assistant manager Gianfranco Zola, who faced the media ahead of the game, and provided an update on the progress of the Belgian.
Spurs, who were playing just 48 hours after a loss to Manchester City in the Premier League, are looking to claim a first piece of silverware under Mauricio Pochettino and end what will be an 11-year wait for a trophy.More news: Houston Texans take wide receiver Demaryius Thomas from Denver
It will not be an easy task however, for the Rams to grab a second Premier League scalp given Chelsea's impressive start to the season under Maurizio Sarri.
21' - OWN-GOAL! Chelsea 2-1 Derby: Dear, oh dear! "If we relax that then we are not the team we want to be".
Chelsea's game against Derby County can be viewed by United Kingdom residents on Sky Sports Main Event and Sky Sports Football, which are channels 401 and 403 respectively on Sky and channels 501 and 503 respectively for Virgin Media users. He was one of the first players I analysed and I said 'this player is for us'.
Chelsea was drawn to play Bournemouth at home in the quarterfinals.
Derby did well to break down United in historic fashion during the third round, but it will take a lot for Lampard to continue his fairytale story during his upcoming homecoming.More news: Unrepentant Ty Montgomery hits back at anonymous teammates who blasted him
Zola sees no reason why Mount and Tomori could not celebrate a Derby goal or victory.
"We were in control until about 10-15 minutes to go".
Kovacic is unlikely to be in the most competitive position in the whole Chelsea side and he might need an eye for goal to make it his.
The last time Frank Lampard walked onto the Stamford Bridge pitch in away colours, he was booed. Two goals from Son Heung-min and a strike from Fernando Llorente gave Tottenham a 3-1 win against West Ham while Championship side Middlesbrough upset Premier league outfit Crystal Palace 1-0.
Key Stat: Chelsea (31) and Derby (30) have combined to score 61 goals in all competitions this season.More news: Cleveland Browns Fire Head Coach Hue Jackson
Ruben Loftus-Cheek should get a well-earned start having scored four goals in his last two appearances but Olivier Giroud is a doubt due to muscle fatigue so Alvaro Morata may keep his place up front.