Leeds boss Marcelo Bielsa insists January signing Jean-Kevin Augustin needs to be fully fit before he throws him into the first team.
The Whites added the French striker last month as they sought to resolve their issues in front of goal.
But since he signed for the Championship side Augustin is yet to even make the bench despite Leeds struggling for form.
Bielsa watched his side fail to break down relegation threatened Wigan at Elland Road at the weekend as they were knocked off top spot.
And despite Leeds' need for goals the Argentine insists, while having plenty of faith in Augustin, he must first be in the right physical condition.
He said: "If he arrived here without us paying that money, it's because he has to resolve a problem - that he wasn't playing. His fitness performance is very important.
"Players who arrive here are going to play if they're better than the players who are playing
"I'm confident in Augustin's ability. I believe he's a player with great skills. But in football, and even more in a league like the Championship, a player can't arrive and play without being at an ideal level."
Finding the back of the net has been Leeds' biggest issue this season as they struggle to turn their domination into points.
Patrick Bamford is leading the club's scoring charts with 12 but has been wasteful at times which led to the Yorkshire side seeking reinforcements.
Prior to January there were suggestions U23 forward Ryan Edmondson may be deployed following his exploits in the youth ranks, but Bielsa claims his efforts "were never enough to be considered" for the first team.