Roberts has impressed for Leeds since replacing Kemar Roofe in the side.
Leeds ace has struggled for game time.
Dallas started at left-back on Saturday as Leeds drew with Brentford.
Stuart Dallas started at left-back for Leeds United's latest Championship clash at the weekend.
Marcelo Bielsa’s Leeds United will face Brentford at Elland Road in the Championship this afternoon.
Marcelo Bielsa needs to replace Barry Douglas at left-back ahead of Leeds United's Championship fixture against Brentford at Elland Road
Leeds United will hope to move three points clear at the top of the Championship on Saturday.
Leeds United's Tom Pearce now appears to be in contention to make his first Championship start of the season.
Tom Pearce got the chance to impress at the heart of Leeds United's defence during their latest under-23 game.
Leeds United defender Tom Pearce has struggled for game-time so far this season.