The former Celtic captain had to be subbed midway through the first half at the Emirates after complaining of discomfort in his knee.
Tierney has struggled with injury since joining the Gunners in a £25m move from the Bhoys but he’s been a standout performer for Mikel Arteta’s side this term and the Gunners suffered in his absence against Jurgen Klopp’s side.
Speaking after the game, Arteta said: ‘He felt something in his knee and he was in pain.’
Tierney will be sent for a scan in the next 48 hours once the swelling subsides in his knee and the Daily Mail claim the Gunners fear he could be set for a month on the sidelines.
That would be a bitter blow for Arteta, with his side potentially playing the quarters and semi-finals of the Europa League in that time.
Arsenal also expect to be without David Luiz for the next four weeks after the Brazilian underwent a minor procedure.
The Gunners are nine points off the top four and barring an astonishing recovery, they’ll need to win the Europa League to qualify for the Champions League.
It’s hoped the pair will be back for the latter stages of the tournament, provided Arsenal can overcome Slavia Prague in the last-eight.
MORE : Mikel Arteta endorses Arsenal’s push to sign Inter defender Achraf Hakimi
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