Reacting on Derby's chances against Chelsea in their Carabao Cup clash, Lampard, who is still adorned by club's fans believes Hazard's form will be a huge challenge for the Rams.
On one hand, they want their team to do well in the EFL Cup, as a cup run would be great for Maurizio Sarri's first season.
Two astonishing early defensive errors at Stamford Bridge from Fikayo Tomori on loan from Chelsea and Richard Keogh either side of a Jack Marriott equaliser gave the home side a 2-1 lead.
Jack Marriott and Martyn Waghorn scored the goals for Derby, with Cesc Fabregas scoring the victor just before half-time. "I think we deserved a draw on chances created, for sure".
This is actually the truth, Man Utd so far have conceded just three goals in 10 matches, Liverpool have conceded four while Chelsea have conceded seven. I joke because i'm proud. I turned round thinking we'd got the foul, then looked back and they were in our box. You know I respect this club but I'm proud of the Derby County players. The 40-year-old former England midfielder received a rapturous reception on his first return to Stamford Bridge as a manager, soaking up the atmosphere before kick-off.
And Chelsea have made the step, assistant boss Zola says, to aid the development of the players.
Tomori's test was enhanced when he diverted an innocuous Zappacosta cross into his own net after mis-kicking an attempted clearance. Midway through the half, lightning struck twice when Keogh failed to deal with another Zappacosta delivery, haplessly steering the ball into his own net.
Redknapp was joined in the studio at Stamford Bridge by former Chelsea striker Jimmy Floyd Hasselbaink, who was impressed with the way his former team-mate Lampard set Derby up to give Chelsea problems.
O'Connor, however, was sent off with six minutes remaining for clattering substitute Pierre-Emerick Aubameyang and Arsenal held out to reach the last eight.
Roy Hodgson's side will have undoubtedly been despondent at the news Eden Hazard will likely be fit for the weekend, but the Crystal Palace rearguard will also feel that recent performances prove they are up to the task of containing the league's top-scorer.
In September, the Belgian was named the Player of the Month, while Messi with a fractured arm missed Barcelona 5-1 El Clasico win over Real Madrid on Sunday.
The Blues are now unbeaten in all competitions since the Community Shield defeat to Manchester City, including 11 wins and three draws.