Katie Poore felt Pompey Ladies were unfortunate to lose 2-1 to West Ham on Sunday.
The Blues were 2-0 down at the break but stormed back in the second half and went close to snatching a point.
Lucy Quinn reduced the deficit with her second goal of the season.
Pompey substitute Jess Frampton made a big impact when she came on and almost made it 2-2.
She put the ball in the net but it was ruled out for offside.
Blues midfielder Leeta Rutherford then struck the crossbar as West Ham escaped with the three points.
It was a disappointing outcome for Pompey, who had beaten Chesham 3-1 on the opening day of the season.
Joint boss Poore did not feel the result reflected the match.
She said: ‘Over the 90 minutes we dominated the play.
‘It’s always close against West Ham at Thurrock.
‘The frustration for us was that we conceded two before we really started to get going.
‘On the plus side we didn’t revert to the long ball, we continued to play good football throughout the match.’
West Ham took the lead on 18 minutes.
Natalie Crinean latched on to a soft header back from Pompey centre-back Lauren Murphy and beat the stranded keeper Sadie Blakely.
West Ham right-back Vicki King made it 2-0 with a spectacular lofted shot from 30 yards.
Quinn scored direct from a corner on 74 minutes to get Pompey right back into the contest.
But West Ham held out for their first win of the season.
Poore felt the impressive Frampton was unfortunate to be denied an equaliser by the officials.
She said: ‘We had the ball in the back of the net but it was deemed offside.
‘Jess Frampton gave the game a bit of pace when she came on.
‘She put the ball in but the flag went up.
‘There was a player offside but she wasn’t interfering with play.
‘It was disappointing.’
Pompey host Cardiff on Sunday and will be looking to secure a second home win on the bounce.