Welbeck’s challenge in the penalty area on Cesc Fabregas was referred to Video Assistant Referee Neil Swarbrick by Martin Atkinson but after a lengthy delay the decision was no penalty.
Welbeck told Sky Sports: “I didn’t know the VAR was actually looking at that incident. I knew I cleanly got the ball so I wasn’t worried at all.
“I could see him (Atkinson) talking to somebody in his ear but I got the ball clearly so I wasn’t worried.”
Calum Chambers added: “You’re aware. You can see them talking in their ear but it’s one of those things, we’ll get used to it.”
Arsenal boss Arsene Wenger, who confirmed that Francis Coquelin has completed a move to Valencia, said of the VAR incident: “What I was worried about was that it took too much time.
“I thought maybe they were not sure that it was not a penalty so they looked at it again and again and again.”
Asked whether Coquelin’s departure left the Gunners light on players and if he may look to bring new players in, Wenger added: “At the moment we have five big injuries and hopefully we will get some back .
“I believe that the earliest to come back is (Aaron) Ramsey and that is quite welcome because it is an area where we are a bit short at the moment.
“If we didn’t lose Jack (Wilshere) tonight and have Ramsey back and (Mesut) Ozil back maybe on Sunday we would have quite good numbers. But it could look a bit short.”
Chelsea boss Antonio Conte felt more time should have been added on at the end of the game for the VAR incident and also injuries: “I didn’t comment about the VAR (to the referee at the end of the game).
“I think there are situations where you have doubt about these and you have to check but at the same time in extra time you have to consider this.
“For me it is only disappointment about extra time because I think in the second half the doctor went on the pitch twice and then if you stop to listen to the VAR you have to give more minutes in extra time.
“In Italy sometimes extra time is seven, eight, nine minutes, but at the same time I think it is right to have the possibility to deal with a situation like today.”