But referee Eric Wattellier reversed the decision after a video replay showed that David was fractionally offside when making his move, and rescinded the yellow card shown to Aguerd.
The home side threatened little after the break and it was a comfortable win for Lille, which trails defending champion PSG on goal difference after 21 rounds.
Rennes midfielder Clement Grenier made a strong claim about Wattellier’s attitude after the match.
“He speaks out of turn, says aggressive things during the game,” Grenier told broadcaster Canal Plus. “Throughout the match he’s telling me that he’ll referee against us.”
PSG and Lille remain two points ahead of third-place Lyon, which won 5-0 at local rival Saint-Etienne. Forward Tino Kadewere and center half Marcelo scored twice, while Memphis Depay created three goals.
After Kadewere struck from close range in the 15th following Depay’s corner, Marcelo headed home in the 35th and 58th from free kicks taken by right back Leo Dubois.
Saint-Etienne coach Claude Puel had to field an inexperienced side because several players were unable to play after contracting the coronavirus.
Lyon took full advantage as Kadewere grabbed his second of the night, scoring in the 67th after again being set up by Depay. That took Kadewere’s tally to four against Saint-Etienne this season — he scored both in a 2-1 home victory back in November.