Huddersfield boss David Wagner waiting on fitness of duo for Yorkshire derby
Huddersfield hope to have forward Izzy Brown and midfielder Philip Billing available for their crunch Yorkshire derby at home to fellow promotion-chasers Leeds.
Brown picked up an injury in Thursday's 3-1 home win over Brighton.
It is a problem manager David Wagner admits will need "further investigation".
He is, however, optimistic that Brown will be back in time and that Billing - who sat out the Terriers' success against the table-toppers because of illness - can return too.
Defender Liam Cooper, who was sent off in the FA Cup defeat to Sutton, is available after serving his suspension as Leeds look to gain revenge for the home loss to Huddersfield in September.
Leeds boss Garry Monk also has loan signings Modou Barrow and Alfonso Pedraza in his squad after the pair were ineligible for the midweek win at Blackburn.
Barrow previously worked with Monk at Premier League side Swansea and has signed until the end of the season, while Villarreal winger Pedraza has been on loan at CD Lugo in the Spanish second tier.
Defender Charlie Taylor remains sidelined with the Achilles injury suffered at Brentford before Christmas.