Ben Thompson conceded that it was a disappointing day at the office for Pompey against Gillingham.
First half goals from Tom Eaves and Alex Lacey saw their impressive unbeaten record come to an end at a rain-soaked Fratton Park.
But the Blues were not the only side at the top of the table to come unstuck, ensuring they maintain their position at the League One summit.
And Thompson – who was brought on after the interval – wants to make sure they recover quickly from this first defeat.
The midfielder said: “We gave away the two goals in the first half and that obviously put us on the back foot.
“But I felt the team were really pushing after the break and were on top, but nothing was falling for us.
"We’ve had a hell of a run and that’s come to an end, but that doesn’t mean we’re finished. We have to go again and start another one."
“All our shots were getting blocked and crosses were going across goal – it just seemed to be one of those days.
“We’ve had a hell of a run and that’s come to an end, but that doesn’t mean we’re finished. We have to go again and start another one.
“You’re not going to win every game and it’s about maintaining consistently good form over the whole season.
“We’re still at the top of the league and we want to stay there – there’s no reason why this team can’t do that.
“The quality in the changing room is second to none, so we have to get over this and look ahead to two games next week.”
Thompson has not started any of the past five matches, although impressed after entering the fray against Gillingham.
He said: “I thought I did well in my first few games, but there will always be changes in football and Closey’s been brilliant since he came into the team.
“When I get my chance I’m going to try to take it because I want as many minutes as possible – that’s why I came here.”