Roma boss Luciano Spalletti felt his side conceded too much possession in their Champions League play-off round first-leg 1-1 draw with Porto at the Estadio Do Dragao on Wednesday night.
A Felipe goal on 21 minutes gave the Giallorossi an early lead but were pegged back when Andre Silva converted a 61st minute penalty after Emerson Palmieri was adjudged to have handled the ball inside the box.
Roma were already down to ten men by this stage though after Thomas Vermaelen was dismissed early in the second half.
Speaking after the game, he told the club's website, he was pleased overall with his side's performance.
He said: "I'm very happy with the way my players played today, in our first competitive match of the season. They were a delight to watch.
"If you want a technical analysis, I should say that we gave the ball away too much towards the end of the first half after we'd taken the lead.
"We were trying to force things a bit too much when we should have been looking to control the game. We could have waited for them to come at us more since they were behind and we'd have been able to exploit the space, but instead we tried to force things, which is something an experienced side like ours shouldn't do."
He added: "We could have avoided getting ourselves booked as well but I must say we really were excellent in the opening period. We battled from the off at a hostile ground. I'm very happy with our performance."