Steve Cotterill has been left to rue the absence of Jonathan Hogg as Pompey seek to build on their Doncaster breakthrough.
The Blues midfielder has been given an automatic one-match ban following his Keepmoat Stadium dismissal.
There is no possibility of an appeal to the red card issued by referee Andy Haines, as it was the culmination of two yellow cards.
It means the impressive Aston Villa loanee is out of Saturday’s visit of Barnsley.
Pompey’s 2-0 success over Doncaster was their first win in 11 matches, lifting them up to 18th spot – seven points clear of the relegation zone.
But young midfielder Hogg will not be available as Cotterill looks to use that result as a springboard up the league table.
He said: ‘Jonathan was absolutely gutted afterwards on Saturday and he will be missed.
‘He’s a fantastic young man and the ultimate professional.
‘He runs, he covers all the ground, he’s a good passer, he’s competitive and a real infectious character.
‘I love him, he’s great.
‘He had his first game against Burnley. I say first game but he never really turned up and neither did the other 10 with him.
‘It started from the QPR game, really, and he’s a real power pack, a right bundle of energy.
‘He’s infectious and that rubs off on a lot of people.
‘Jonathan has 100 per cent brought something to the dressing room. He’s a great lad.
‘I know David Nugent recently compared him to Michael Brown but I wouldn’t do that.
‘I think Jonathan Hogg is his own man.’