Brentford boss Mark Warburton has no new injury concerns for the trip to Preston.
Richard Lee will continue in goal when Brentford take on leaders and London rivals Leyton Orient on Monday.
Carlisle boss Greg Abbott hailed "a great point" after his side held 10-man Brentford to a goalless draw at Griffin Park.
Disappointed Brentford boss Uwe Rosler questioned his side's "energy and desire" after seeing them stutter to a goalless home draw with Carlisle.
Sheffield United caretaker boss Chris Morgan is expected to pick his side to face Brentford from an unchanged squad.
Brentford are waiting on midfielder Harry Forrester ahead of their crucial trip to promotion rivals Sheffield United.
Brentford skipper Jonathan Douglas is set to keep playing through the pain barrier against Portsmouth.
Brentford midfielder Jonathan Douglas is expected to be ready in time to face Crewe.
Kevin O'Connor and Farid El Alagui could be added to the Brentford squad for the trip to Coventry.
Fernando Torres rescued Chelsea and Rafael Benitez from FA Cup humiliation as the holders denied Brentford arguably the biggest scalp of all in this season of
Jake Bidwell will miss Brentford's glamour FA Cup fourth-round clash with holders Chelsea at Griffin Park through suspension.
Brentford have agreed a deal to sign Millwall defender Scott Barron, subject to a medical.
Round-up: Ipswich went down to their first friendly defeat of the summer as two goals from Janos Kovacs secured a 2-0 win for Luton.
Ryo Miyaichi scored on his full Bolton debut as the Trotters reached the quarter-finals of the FA Cup with a 2-0 win at Millwall.
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