Kenny Jackett admitted Pompey didn’t deserve more than a point against Shrewsbury.
Brett Pitman rescued his team against John Askey’s side with a penalty three minutes from time to earn them a 1-1 draw.
That was after the Blues were second best in the first half before falling behind to Greg Docherty’s 74th-minute finish.
Jackett could see his team didn’t have the penetration which saw them score seven goals in the previous two matches.
He said: ‘We didn’t deserve to get a win from the game.
‘Shrewsbury really did a good job on us defensively and stopped us building up any combinations or situations to create the clearcut chances we’ve had.
‘Gareth Evans had a header in the second half which was well saved.
‘But apart from that they had a big, powerful back four and an experienced player in front of them.
‘In the second half we built some momentum and were almost exclusively in their half but struggled to create the chances we needed to win the game.’