Tottenham captain Heung-min Son will be assessed after picking up a knock in midweek.
The South Korean forward labored during a 2-1 defeat to West Ham United in the Premier League.
Son took a blow to his back late in the clash, causing him to hobble off in some discomfort.
Nothing new really. The last update I got late last night was that he was a bit sore last night after the game. We'll have to see today," Postecoglou said to reporters.
Spurs are on a run of poor results that has seen them slip to fifth in the league table.
They next take on fellow top four battlers Newcastle United in the top flight on Sunday.