Defender says Blues will improve
He was making just a second competitive start for Pompey in 17 months.
And Jack Whatmough believes he will continue to improve with more minutes on the pitch this season.
The academy graduate – who injured knee ligaments against Cheltenham in March 2015 – played the entire 90 minutes as Carlisle visited Fratton for an opening day clash.
There was a sense of frustration as the Blues had to settle for a 1-1 draw, despite dominating proceedings.
But – like his own performances – Whatmough has backed them to grow as the campaign progresses.
He said: “We showed our quality in the second half and Carlisle were hardly able to touch the ball.
“But at the end of the day we couldn’t break them down and came off the pitch feeling a bit disappointed.
“I haven’t scored for Pompey yet and there were a few set-pieces that I could have done better from.
“You don’t win the league or get promoted after one game, though, and we can build on that point on the board.
“We look fit and strong as a squad and we have to look on the result as a stepping stone to improve on.
“The first 45 minutes wasn’t the best for me on a personal note, but I grew into the game.
“It was the second competitive game I’ve started since coming back from my injury, so there’s a lot to build on me. That’s gone now and I’m just looking forward.”