The Gunners entertain the Reds on Sunday evening and ahead of the encounter, they have received a huge setback.

Riccardo Calafiori suffered a knee injury in the second half of yesterday's Champions League encounter against Shakhtar.

He could not carry on despite his best efforts and manager Mikel Arteta has acknowledged that there is some sort of concern.

If Calafiori is deemed unfit to make the game, Arteta could have a huge selection headache on his hands against the Reds.

Oleksandr Zinchenko and Jakub Kiwior are error-prone while Takehiro Tomiyasu may not start amid his knee problem.

The Japanese has played just six minutes since pre-season and may not be risked in a high intensity game on Sunday evening.

Jurrien Timber is the other option if he is deemed fit after injury, but he could play in central defence with Gabriel as William Saliba is suspended.

Myles Lewis-Skelly could get a surprise start on the left side of the defence.

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