Midfielder Rossiter is believed to have suffered an injury for Rangers, with fans suggesting as much on Twitter.
Rangers earned a comfortable 3-1 victory over Welsh side The New Saints in a behind closed doors friendly on Tuesday - in the absence of Jordan Rossiter.
Plagued midfielder Jordan Rossiter is said to have suffered somewhat of a problem and missed the game against TNS, as Ross McCrorie, Serge Atakayi and Jamie Murphy all got their names on the scoresheet.
But Rossiter, 21, has picked up an injury which will worry new manager Steven Gerrard, with the former Liverpool star expected to be one of his main midfielders in the upcoming 2018-19 campaign.
Rossiter has had little luck with injuries, making just 11 league and cup appearances since joining the Gers in the summer of 2016 under former manager Mark Warburton. Fans on Twitter have claimed that he is "wearing a protective boot".
If Rossiter has indeed suffered a long-term injury that keeps him sidelined for the foreseeable future, Gerrard needs to make a decision on whether to replace him. But he could decide to perform a u-turn instead.
However, with Graham Dorrans injured and Ryan Jack still recovering from a long-term ankle problem, the Gers have also loaned Jason Holt to Fleetwood. An injury to Rossiter leaves the Gers slightly light in central midfield.
Gerrard is likely to use three central midfield players and with only McCrorie, Scott Arfield, Ovie Ejaria and Greg Docherty to choose from, surely Halliday is worth keeping.
The Gers must weigh up the severity of Rossiter's injury, but if it is a serious one that could keep him sidelined beyond the start of the season, Gerrard must forget about selling Halliday and use the left-footer as cover.