The 23-year-old yesterday underwent an operation in a bid to solve his troublesome hernia problem.

The move comes after an injury-dogged start to the campaign in which the striker has failed to make a single appearance.

Nugent had already undergone surgery in January to repair the damage.

But ultimately it has failed to be a success.

Now the latest attempt is expected to keep him on the sidelines for up to two months.

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Redknapp said: 'David's had a hernia operation which is disappointing for the lad, it really is.

'He hasn't played since the start of the season.

'The problem's come up again so he had to go to London for an operation. Let's hope it works this time.

'It's disappointing. We'll just have to see how it goes.'

Pompey have used a London specialist they have employed in the past in the hope of correcting Nugent's problem.

His last appearance was in the FA Cup final against Cardiff, when he impressed after coming on as substitute.

However, he has featured in two reserve matches this season, although the injury has flared up again.

Meanwhile, Lassana Diarra is receiving treatment from the medical staff of the French national team.

The Blues midfielder picked up a slight knee irritation in the UEFA Cup second-leg tie over Guimaraes at the end of last week.

The complaint forced him to pull out of France's World Cup qualifier in Romania, having been expected to start.

He is now in their medical team's hands and will return to Fratton Park next week.

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