Mikel Arteta faces a selection headache as Arsenal had seven players absent from training on Tuesday.
The Gunners host Monaco on Wednesday night, live on talkSPORT, in their final Champions League fixture of 2024.
Arsenal had big names in training but also a lot of absentees
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Arsenal had big names in training but also a lot of absenteesCredit: AFP
Arsenal missed Ben White, Gabriel, Riccardo Calafiori and Takehiro Tomiyasu in their 1-1 draw at Fulham, and saw Oleksandr Zinchenko come off injured.
Their defensive problems appear to have worsened as all five and another two names were not pictured in pre-match training.
Jurrien Timber was their left-back against Fulham and Thomas Partey featured at right-back, with both playing the full match on Sunday.
The duo were not spotted at their London Colney training ground though, leaving Arteta potentially even lighter on defenders for the visit of Monaco.
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Arteta addressed the injury issues in his press conference and said: "We have to manage a lot of the players.
"Some of them will not be fit and available for tomorrow, some of them are still a doubt.
"We still have 24 hours to make those decisions and hopefully the right ones."
William Saliba, Jakub Kiwior and Kieran Tierney played against Fulham and are Arsenal's only senior defensive options for Wednesday.
Tierney could make his first appearance of the season with a start at left-back, with youngster Myles Lewis-Skelly also an option.
Kiwior may be set to partner Saliba at centre-back as he did against Fulham, though the right-back selection will likely prove tough.
Timber was not spotted during the session
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Timber was not spotted during the sessionCredit: Getty
Neither was Partey, with Arsenal lacking in options at the back
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Neither was Partey, with Arsenal lacking in options at the backCredit: Getty
White, Calafiori, Timber and Partey have all played there for Arsenal this season but look doubtful against Monaco.
Academy star Josh Nichols is named in their Champions League squad as a B list player so may be given a surprise call-up.
Arsenal do not appear to have any injury concerns across the rest of the pitch as they look to bounce back from the draw at Fulham.
They sit 7th and above Monaco ahead of the match at the Emirates Stadium, albeit on goal difference.
Arteta's side have won three of their five Champions League matches and most recently thrashed Sporting Lisbon 5-1.
Once the full-time whistle blows on Wednesday, Arsenal will have to wait over a month to return to European action.
Arteta could still make some late decisions ahead of Monaco
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Arteta could still make some late decisions ahead of MonacoCredit: Getty
They will face Dinamo Zagreb and Girona in their final two fixtures of the league phase in January.
Arsenal must finish in the top eight to advance to the last 16, with a final standing of 9th to 24th meaning a two-legged play-off.