McLaren boss Ron Dennis admitted he made a mistake when telling the press Fernando Alonso had actually not suffered concussion after his crash during testing.
The Briton faced the media a few days after the accident and said Alonso only had symptoms but not actual concussion as initially reported.
But Alonso was later ruled out of the season-opening Australian Grand Prix because of the concussion he had suffered.
I wanted to be open honest. I failed.
Dennis conceded he had being inaccurate during his briefing.
"It was not the best performance by me," Dennis is quoted as saying by the Telegraph.
"I understand why the press beat me up for being inaccurate. I wanted to be open honest. I failed. But it is my objective to try to be as honest as possible in future.
"There are a lot of complexities about concussion. It is difficult to quantify, and it goes beyond my area of expertise."
Dennis insisted he expects Alonso to return to action in the second round of the season in Malaysia, but admitted it was ultimately up to the Spaniard.
"It is not my decision. But as far as I know Fernando will be in Malaysia. I have every reason to believe he will be there," he said.
"I spoke to him on the way over here. He wants to race there. I hope he does, but it is his decision, not mine."