Rio Ferdinand: Attempted penalty save against Pompey was 'worst dive ever'
The former England international was forced to act as a makeshift keeper when Harry Redknapp's Blues travelled to Manchester United for the last-eight clash.
Edwin van der Sar was forced off through injury at half-time and was replaced by Tomasz Kuszczak.
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Hide AdHowever, the substitute stopper was sent off when he brought down Milan Baros inside the box in the 76th minute.
As a result, it meant Ferdinand had to go between the posts.
Muntari stepped up to take the spot-kick and fired it beyond the centre-back to move Pompey into the last four.
And Ferdinand admitted his attempt to stop the Ghanian's strike was horrendous.
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Hide AdSpeaking after Denmark's 1-0 win over Peru in the World Cup, he told the BBC: 'I went in goal once at United and it's the loneliest position on the planet.
'I would never be a goalkeeper - they're lunatics for doing it anyway.
'A penalty went in. It was the worst dive ever - horrendous!'
Pompey, of course, would go on to land the FA Cup that year.
They delivered a 1-0 win over West Brom in the semi-finals, courtesy of Kanu's strike.
The Blues then beat Cardiff by the same scoreline in the final, with the Nigeria international again on target.