Collecting a couple of strikes from Pedro Rodriguez in the first half and a shot from Eden Hazard in the second half was about as testing as it got for Cech. The shared points mean Chelsea sit behind the Manchester clubs in third on 10 points; while Arsenal relish in 12th on seven points.
"We needed that after the Liverpool game".
A disappointing Chelsea display ended on a sour note when Luiz followed through recklessly on Kolasinac and referee Michael Oliver reached for his red card.
Arsenal goalkeeper Petr Cech was rarely troubled on his return to Stamford Bridge where he won every major honor with Chelsea over 11 years.
They also shut down a Chelsea juggernaut that had scored for 27 straight home matches under Antonio Conte. Alexandre Lacazette was in the right place for the rebound but he could not keep his effort from sailing over the bar.
Pedro was forced off with an ankle problem at half-time at Stamford Bridge and Conte dropped a massive hint that Hazard could be the man to replace the Spaniard in the EFL Cup.
With neither side able to break the deadlock, both managers opted to bring on the big guns with just under 30 minutes to go.
In this clash of red and blue, the Blues were yet again the team to see red.
David Luiz's red card was the third Chelsea have endured in five games this season, but Conte merely described it as "strange" rather than a concern.
When asked what his views were on David Luiz's sending off after showing his studs to Sead Kolasinac late on in front of the dugouts Wenger replied: "I think even Luiz would accept it was too strong". Luiz let the ball get away from him and was chasing it before the Bosnian managed to get in ahead of him. "Arsenal and Chelsea are both great teams and I think it is a good draw".