Steve Cotterill has backed Jamie Ashdown to bounce back from his QPR howler.
The Pompey keeper let Adel Taarabt’s shot slip through his hands during the second half at Loftus Road on Tuesday night.
That put the Championship leaders on the way to a 2-0 victory.
It was harsh on Pompey, who up until that point had frustrated Neil Warnock’s men.
Now the Blues face Derby at Fratton Park on Saturday in a must-win fixture.
As Cotterill’s number one, Ashdown will once again be in goal.
The 30-year-old has been in impressive form this season after finally being given a run of games.
And the Blues boss is adamant the keeper will put his QPR mistake behind him.
Cotterill said: ‘Jamie has been superb in goal for us all season.
‘There will be no blame attributed to him there.
‘You can’t say anything to Jamie about that.
‘It is a howler, there is nothing more we can say about it.
‘But there have been plenty more times this season when we have won games and he has pulled a save out of the top corner.
‘You can’t say anything to him other than he needs to keep his head up.
‘He needs to get back into training today and tomorrow, catch it and kick it.
‘Then he needs to catch it and kick it on Saturday, which he will do.’
Ashdown has been an ever-present so far, racking up 32 appearances.
It’s in stark contrast to the four previous seasons he served as David James’ understudy.
The former Reading man’s displays recently saw him described as a ‘revelation’.
Now his manager has every confidence he will come back from Tuesday night’s gaffe.