Arsenal and Unai Emery are in great doubt before the Premier League fight against Newcastle United on Monday night.
The Gunners host the team of Rafa Benitez at the Emirates Stadium, which wants to consolidate their position in the first four of the last six weeks of the campaign.
However, they may have to do so without midfielder Granit Xhaka, who suffered a hamstring injury during the international break.
The midfielder won 3-0 against Denmark in the European Championship qualifiers for Europe 2020 on Wednesday evening, scoring his side's second goal in a typically spectacular system.
However, he had to be replaced eleven minutes before the end after complaining about a thigh problem. After leaving the field, he had to watch as Denmark staged an incredible comeback. He scored three goals in the last six minutes to win 3: 3.
On his return to the UK, Xhaka released a social media update: "Back in London, but still unhappy that we did not secure the three points in the European Championship qualifier against Denmark.
"It's always painful not to be able to overcome the full distance, but I got as close as I could until I asked in the 79th minute after my transfer.
"After I could not finish the match with my teammates, I will receive the first treatment tonight [Thursday] to make sure you recover quickly. "
His absence would be a heavy blow to Arsenal on Monday night, especially as Lucas Torreira was still suspended following the red card he showed against Tottenham in the Northern London derby.
Undoubtedly, there is also Aaron Ramsey, who returned early from Wales to London Colney because of a thigh problem. The 27-year-old, however, will recover in time.
Sokratis and Sead Kolasinac played the entire 90 minutes of the Greek game against Bosnia on Tuesday, showing no sign of injuries that had prevented them from playing at the weekend.
Unai Emery is expected to post an update on Nacho Monreal's fitness at his pre-match press this afternoon, which had to face Arsenal's training camp in Dubai for a calf problem due to a calf problem.
Arsenal awaited XI against Newcastle: Leno, Sokratis, Koscielny, Monreal, Maitland-Niles, Kolasinac, Guendouzi, Ramsey, Ozil, Lacazette, Aubameyang.
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