Charlton will check on Ezri Konsa ahead of the visit of Oxford.
The teenage defender hobbled off injured just 30 minutes into Saturday's 3-3 draw at Rochdale.
Konsa was replaced by Jorge Teixeira, who pushed his claims for a start by scoring twice including a last-gasp equaliser.
Nathan Byrne is back from a ban but Harry Lennon, Roger Johnson and Jason Pearce remain sidelined.
Oxford must dust themselves down as they return to league action following their dramatic 3-2 FA Cup defeat at Middlesbrough.