Luiz Felipe Scolari reserved judgement on John Terry's dismissal following Chelsea's 3-1 victory over Manchester City.
The Blues captain was shown a straight red card for a foul on Jo 13 minutes from time even though there appeared to be defensive cover behind him.
Referee Mark Halsey ruled that Terry was the last man but Scolari will not decide whether to appeal the decision until he has spoken to the club's hierarchy.
"I would need to see it again on TV before I could really speak about it," said the Chelsea boss.
"I let the referee make decisions but I will speak to the players and the board because I don't have any idea what happened."
Scolari was delighted with the way Chelsea battled back to win after falling behind to a Robinho free-kick early on.
Scolari had wanted to sign his Brazilian compatriot over the summer and greeted the player with an embrace prior to kick-off.
"I have wished him all the best at Manchester City because I like him and he is my friend," explained Scolari.
"He scored once and we got three, so I am happy with that. Hopefully it will be the same next time we play City and I will be happy again."
Scolari also confirmed that midfielder Michael Ballack will return from a foot injury when the Blues open their UEFA Champions League campaign against Bordeaux on Tuesday.
"He will play on Tuesday but I do not know whether it will be for 45 minutes, 60 or 70," he said.
"The problem is they all want to play all the time because they have so much confidence."