Steve Cotterill has distanced himself from a move for Aston Villa’s Chris Herd.
And he admitted Pompey are unlikely to make any more emergency loan moves before Thursday’s deadline.
Football League clubs have three days remaining if they want to make loan recruits.
Pompey already have six loanees in their squad, with a maximum of five allowed in a match-day squad.
They have now been linked with a move for Australian midfielder Herd.
The 21-year-old played in Villa’s 1-0 defeat to Wolves at the weekend, his maiden Premier League start.
He spent last season on loan at Lincoln and scored a hat-trick for Villa’s reserve team against Arsenal this term.
The Blues already have Jonathan Hogg on loan from Villa Park.
But Cotterill has dismissed speculation his team-mate could be joining him on the south coast.
And it appears there will be no further arrivals to bolster the play-off push.
Cotterill said: ‘I doubt we’ll sign anyone else before Thursday. We’re okay.
‘David Cotterill is over the line, that’s our loan players done now. I don’t think we’ll get in anyone else, no.
‘I’ve heard about the link with Chris Herd, someone else has mentioned that to me.
‘I know him from being on loan at Lincoln last season and he’s a good, young player.
‘I don’t know where that link has come from, though. I’ve no idea.
‘I know him. Do I like the player? Yes. But it certainly hasn’t come from us because I would always talk to the manager before it goes to any newspaper.’