Dion Donohue insisted Pompey deserved a point against Blackburn.
The Welshman reckons the Blues more than matched the League One high-flyers and the defeat was difficult to take.
Kenny Jackett’s troops suffered a gut-wrenching late loss against Rovers last night.
Adam Armstrong netted an 87th-minute winner – his second of the game – which left the majority at Fratton Park flattened.
Pompey had twice as many shots as Tony Mowbray’s side, but only Conor Chaplin could find the back of the net on 50 minutes.
Donohue admitted there was a subdued mood inside the home dressing room after the Blues were denied a point.
And the left-back felt Rovers had luck on their side,
He said: ‘It’s very frustrating for us. We more than matched Blackburn and to come away with nothing is very disappointing.
‘They had the first 10-15 minutes of the game, but I think we grew into it after that.
‘Going into half-time, we were much the better side and had more chances in the second half as well.
‘The dressing room afterwards was more subdued that we’ve come away with nothing, especially the way we played.
‘We definitely deserved something out of the game and the lads are disappointed we’ve come away with nothing.
‘The first goal is disappointing from us because he (Armstrong) has managed to get a shot in from the six-yard box in the middle of the goal.
‘That’s a bit disappointing while the second one has just fallen right into his path.
‘Blackburn had the luck and we never (had it).’
Last night’s defeat was the first of four matches in 11 days for Pompey.
Jackett’s outfit travel to in-form Southend on Saturday, before a trip to Fleetwood the following Tuesday.
The busy run of fixtures then finishes with a home clash against Blackpool on February 24.
Although the Blues started off that hectic fixture list with a reverse, Donohue is confident his side can bounce back at Southend.
The former Chesterfield player believes Pompey are capable of picking up the next nine points on offer. ‘We just need to get it out of our system quickly and go to Southend and get three points on Saturday,’ Donohue added.
‘We’ve got Southend and then Fleetwood, both away games.
‘We can definitely go and win both of them, no doubt.
‘Then we’re back at Fratton Park against Blackpool, so we’re aiming to get maximum points out of the three games.
‘Hopefully, that’s what we can go and do.’