Brentford have only won one of their past 11 Championship matchesFollow live text coverage from 19:00 GMT on Tuesday
Brentford midfielder Romaine Sawyers is available to return after missing the defeat by Middlesbrough because of a one-match suspension.
Wingers Said Benrahma and Ollie Watkins remain doubts, and midfielder Kamohelo Mokotjo (ankle) is out.
Sheffield United boss Chris Wilder has no fresh injury concerns following Saturday's 2-2 draw at Rotherham.
Striker Leon Clarke came off the bench against the Millers and could be in contention to start.
Match facts
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Brentford have won two of their past 12 league matches against Sheffield United (D5 L5).
Sheffield United have taken one point from their past three league visits to Griffin Park (P3 W0 D1 L2).
Brentford have won just one of their past 11 league games (D4 L6), losing five of their last six (W1).
Sheffield United are winless in their past three Championship away games (D1 L2), after winning four of their previous five on the road (L1).
Brentford have scored more goals via corners than any other Championship team this season (7).
Source: bbc.com