Millwall boss Neil Harris shared his frustration after letting a two-goal lead slip at home to Middlesbrough on Saturday afternoon, but also praised his "excellent" side on the opening day.
Aiden O'Brien and Lee Gregory sent The Lions two to the good at the half-time break, but Martin Braithwaite and George Friend - in the 87th and 97th minutes respectively - snatched a draw for the below-par away side.
Speaking to millwallfc.co.uk in the aftermath, the manager stated the majority of the game was "men versus boys," but also bemoaned his team's ability to see the game out.
"What a frustration. I want to start with the positives - we were excellent today," he said. "For 87 minutes, it was men versus boys. I said to the players that the two goals we conceded were rubbish goals - poor, naive goals. We have to be so much better.
"But we should've been out of sight. We missed absolute sitters and didn't use the ball wisely enough in the penalty area. We should've seen Boro off today. But, if you don't, then you always leave yourself open.
"We were playing against a quality side with superb players. We played them off the park for 87 minutes, but if you don't kill them off then you give them the chance to get back into it. I've said to the players that that's a lesson today. We have to be ruthless in front of goal, more professional and more experienced when we're dealing with things in areas like we did at the end.
"I don't think Tony (Pulis) will be saying anything other to the press than how good Millwall were. First and second contacts, scoring two goals, missing sitters - we dominated areas of play. It was as good an 87 minutes today as any game we saw last season.
"The atmosphere was electric, we just switched off in time added on at the end."