Mikel Arteta says title-chasing Arsenal have had to be "different" while captain Martin Odegaard is sidelined by an ankle problem.
Odegaard has missed Arsenal's last six games with the injury he suffered playing for Norway last month, an absence that has forced Arteta to change his plans.
Arteta said on Friday that the midfielder was "working so hard" to return, but the Gunners boss could not pinpoint when he would be back in action.
Leandro Trossard has come in for the top-flight games missed by Odegaard, as well as the Champions League win over Paris Saint-Germain this week.
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