Brentford boss Uwe Rosler is set to make changes.
The Bees have slipped to sixth after back-to-back defeats by Stevenage and Carlisle, so midfielder Tom Adeyemi and striker Bradley Wright-Phillips are pushing for recalls.
Winger Sam Saunders is set to miss out again with the knock which sidelined him in Cumbria on Saturday.
Rosler has allowed Paul Hayes to join Crawley on a month's loan as fellow striker Farid El Alagui is close to returning from a knee injury.
El Alagui is back in full training but Tuesday will come too soon, so Hayes' place in the squad will probably be taken by midfielder Harry Forrester, who missed out at the weekend.
Club captain Kevin O'Connor is also training after a long-term ankle injury but will not be risked yet.
Swindon are sweating on the fitness of two players.
Nathan Thompson (knee) and Tommy Miller (calf) both picked up their knocks in the 2-2 draw with Walsall and out doubts ahead of the clash.
Simon Ferry is likely to move to central midfield if Miller is ruled out, with either Luke Rooney or Raffaele De Vita coming in on the right of midfield.
Youngsters Connor Waldon and Alex Ferguson could travel after being included in the matchday squad on Saturday but Miles Storey (hamstring) and Troy Archibald-Henville (knee) remain sidelined for the third-placed Robins.
Swindon are two points ahead of the Bees ahead of the clash and just two points off the second automatic promotion spot in the league.