It will not be the first time the former team-mates have confronted each other in their post-playing careers - Villa beat Lampard's Derby three times last season, including in the Championship play-off final - but the Chelsea manager accepts this meeting carries extra significance.
Sooner or later Frank Lampard is going to have to start making decisions over transfers at Chelsea and one pressing problem which needs to be resolved is at left-back.
Villa, sitting perilously close to the relegation zone, were far too passive early on and could have few complaints when they fell behind.
Villa equalised with their first real chance of the game in the 41st minute when Egyptian Trezeguet headed a cross from his compatriot Ahmed El Mohamady on to his own foot and the ball crossed the line.
The Villans will head down to Stamford Bridge looking to build on a solid draw at Manchester United at the weekend, and will see a familiar face in the opposition side, with Tammy Abraham expected to line up for the Blues.
According to The Athletic, Chilwell is Chelsea's "number one target", although they are also considering alternatives, with Lampard having been unconvinced by current options Emerson Palmieri and Marcos Alonso.
Aston Villa boss Dean Smith insists Jack Grealish won't be sold in January. The pair repeatedly combined to cause Villa left-back Matt Targett all kinds of problems and it was no surprise that both home goals came from right-wing crosses.