Tony Adams' entertainers have attracted 13 goals in their past three matches.
That includes the memorable AC Milan 2-2, a draw with Hull by the same scoreline and Sunday's 3-2 Blackburn triumph.
Their next Uefa Cup game is in Wolfsburg tomorrow on a night which could see their dreams of reaching the last 32 end.
The German outfit have yet to lose a game at home this season and need just a point to qualify.
A draw would be seen as a good result for the Blues. But if Braga win at Heerenveen in the other group E match, it would lead to Adams' men going out of the competition.
>>> Follow the Wolfsbury v Pompey live online with The News' text commentary service. Click here for more information.Kranjcar admits Pompey's natural attacking instinct will prevent them from going out for a point, though.
He said: 'I don't think we can play for a draw. If you look over the past couple of weeks you can see that.
'For the neutral it is great, but for us it can be tough.
'If my mathematics are right, if Heerenveen win against Braga we can even lose in Wolfsburg and win our final game and go through.
'Obviously there are a lot of calculations but we should be concentrating on the match.
'I think we have to go out there and play our best football. We'll see what happens after that.
'The win against Blackburn was great. It was our first since Sunderland and important because it's something we can build on.
'Hopefully we can get a couple of wins on the back of that – starting with Wolfsburg.'
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