Dan Thompson has boosted his hopes of earning a contract with Pompey after a successful trial spell.
The 17-year-old Hampton & Richmond striker has caught the eye of several clubs over the past few weeks.
And he has already been the subject of two unsuccessful bids from Stoke City this season.
After trial stints with Newcastle, QPR and Crystal Palace, he spent time training with Pompey this week in a bid to earn a professional contract.
And Blues boss Michael Appleton admitted he could well follow up the club’s initial interest.
Appleton said: ‘Dan has done ever so well.
‘He’s a big lad, he’s got a decent presence about him and he is definitely one we will look to monitor.
‘We need to have a look at as many people as we possibly can.
‘We’re in a position where we can’t really rule anyone out because we’ve got quite a small squad.’
As Appleton settles into the role, he may look to arrange a behind-closed-doors game to assess some of his other squad members, and Thompson could well be invited to play.
But while Pompey may be short on numbers, Appleton is well satisfied with the quality of players at his disposal.
He said: ‘It’s been ideal for me in the international break to have a look at a few of the players who have not been away.
‘The squad is pretty much what I expected.
‘There are numerous players in there with Premier League experience.
‘A few of them have had a taste of getting out of this division and have got a lot of experience of playing in the Championship as well.
‘There is a decent balance to it, in terms of age and experience.’