The winger, recently returned from another worrying injury absence, turned in an impressive display at Fir Park and supplied Georgios Samaras' second-half equaliser with a fine cross.
But that did not diminish the 21-year-old's disappointment at the final outcome as the Hoops fell to their first league defeat in 2013.
The Scotland international insisted that everyone in the squad was desperate to make amends in this weekend's Sky Live Scottish Cup quarter-final tie away to St Mirren, the team who accounted for Celtic in the League Cup last-four.
"It's a team game and maybe in the next match I won't play well and somebody else will, so it's all about the team and hopefully we can get back on track on Saturday," said Forrest.
"It was disappointing. I felt we created enough chances to win the game, and they had two or three shots and scored from two of them so we were a bit unlucky.
"We knew that they are second or third in the league, and we were all up for the game. It just wasn't to be our night and we just need to prepare for Saturday now.
"All of the boys will be up for it, and obviously we want to win the game and go as far as we can in the cup."
Wales international Joe Ledley concurred: "We were obviously disappointed with what happened at Hampden in the semi-final
"On a different day, something different would have happened but we just didn't perform as well as we could have and never took our chances.
"So hopefully we can gain some revenge against them and go through to the semi-finals.
"I know it's going to be a difficult game. Although they haven't been doing as well in the league in recent weeks but they are probably concentrating on their final.
"We want revenge and we have done well at St Mirren recently so hopefully we can continue that form."