As a result, Chelsea have allowed Mount and Tomori to be available for selection by Derby to face them at Stamford Bridge on Wednesday.
The Belgian has been one of the best players in the Premier League this season, sitting atop the scoring charts with seven goals in nine matches.
Speaking about the announcement, Zola told the assembled press: "I can tell you it's not that (Lampard)".
Not only does he wear the same No 8 shirt as Lampard did in his storied career here, but Mount embodies the two qualities his manager has spoken of demanding from his players: being "brave" on the ball and displaying great "desire".
But he grew into the game and made good challenges and good decisions.
Former Chelsea FC forward Zola, who is now working as Maurizio Sarri's assistant manager at Stamford Bridge, is confident Hazard is nearing a return to first-team action.
On-loan Chelsea defender Fikayo Tomori missed his attempted clearance and watched in Halloween night horror as the ball ricocheted off his standing leg and deflected into the net to put the hosts ahead after five minutes.
DF Gary Cahill, 5 - His relative lack of comfort in possession and mobility are the main reasons why he has spent so much time on the bench this season, and Derby targeted the limitations in his game with their fast attack. But, thankfully, the draw for the quarter-finals will occur directly following Chelsea's game against Derby County on Sky Sports, live from Stamford Bridge.
Despite the gulf in stature of recent times, Derby and Chelsea have had a fairly equal record in their past meetings.
Predicted Derby County XI: Carson; Bogle, Tomori, Keogh, Forsyth; Wilson, Huddlestone; Waghorn, Mount, Lawrence; Nugent.
And it is this game from which Derby can gain confidence, with the Blues switching off defensively at times. His forward runs were just as unsafe to Chelsea as to the opponents; both visiting goals came from the space vacated on his flank. "So we didn't have control of the game".
The 27-year-old was forced to sit out Chelsea FC's 3-1 victory over BATE Borisov in their Europa League clash in west London as Ruben Loftus-Cheek netted his first hat-trick for the club.
The Belgium global came off the bench at Anfield in the previous round to score a wonder goal and set up the tie with the Rams, but he will not be repeating those heroics.
Chelsea benefited from two Rams own goals, only for the Championship visitors to equalise on each occasion before Cesc Fabregas' 41st-minute strike proved decisive.
41' - GOAL! Chelsea 3-2 Derby: For the third time Chelsea lead this evening, but Derby aren't happy.