Ibrox side Glasgow Rangers were beaten in their last outing, leaving Steven Gerrard sending out a warning to his players.
Rangers were beaten by Kilmarnock in midweek in their return to league action after the winter break.
The Light Blues’ performance in the contest was highly disappointing, and it seems that Gerrard was not impressed by his side after the match.
“The gaffer has said all of our shirts are up for grabs,” Tavernier revealed. We have a strong squad and guys have to perform to keep their jerseys.”
Gerrard’s side had put pressure on Celtic by beating them in the Old-Firm derby before the winter break, but Rangers are now three points behind their Glasgow rivals after defeat.
Gerrard altered his starting line-up and system against Kilmarnock, with Steven Davis and Jermain Defoe both being handed debuts, but the changes did not have the desired impact.
Rangers are now under pressure to bounce back, as they look to ensure they don’t slip further behind in the title race.
Rangers are next in action on Sunday, when they take on Livingston at Almondvale Stadium.
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