Chris Ramsey praised Grant Hall for his display against Atalanta but suggested the Tottenham defender would be primarily used as a back-up player if QPR decide to sign him.
Centre-back Hall, who worked under Rangers head coach Ramsey at Spurs, is at Loftus Road on trial and came on as a half-time substitute in Sunday’s friendly.
The 23-year-old has first-team experience, having been on loan at Birmingham, Swindon and Blackpool since Tottenham signed him from Brighton three years ago.
However, Ramsey said: “He’s still a young boy – he’s only in his early 20s – and you’d probably look to bring in that ilk of player for the future.
“We probably wouldn’t be looking to bring him in as our mainstay centre-half at the moment, but it’s about competition and people fighting for places and prising their way into the team.
“We do need to recruit a centre-back. I thought Grant did okay.”
Rangers drew 1-1 with their Italian opponents, who led before summer signing Jay Emmanuel-Thomas equalised midway though the second half.
“It was a tough challenge because of the way Atalanta knocked the ball about and the way they defended,” said Ramsey, who hopes to make further additions to his squad before Saturday’s Championship opener against Charlton.
“It helped us to learn a little bit more about the players that we’ve got. At the moment we’re a bit short of personnel, but the players here are trying to do what’s required.”