Injuries to Luke Ayling and Raphinha added to the Elland Road issues in the wake of Friday night's draw at Newcastle while the club's young stars are itching to make an impression.
Crysencio Summerville made his Premier League debut as a second-half substitute against the Magpies and could be given a greater chance to make his mark at Craven Cottage on Tuesday.
Reflecting on Summerville's display, Bielsa said: "He didn't have too many minutes and few chances to unbalance them but he did show personality.
"He asked for the ball, he didn't lose it, he contributed to the possession but clearly he wasn't able to unbalance."
While Bielsa's men are still waiting for their first league win of the season, the club's under-23 stars swept aside Liverpool 4-0 on Sunday.
The game saw a welcome return for Adam Forshaw, who is also in the frame to make a rare first-team appearance against Marco Silva's side.
Injuries continue to restrict Bielsa's options with Robin Koch, Diego Llorente and Jack Harrison all sidelined, adding to the potential absences of Ayling and Raphinha.
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