
Arsenal have been hit with a setback as William Saliba is expected to be out for three to four weeks, according to L’Équipe.
The French defender left the pitch just four minutes into the match against Liverpool after suffering an ankle injury.
Manager Mikel Arteta had no choice but to bring on summer signing Cristhian Mosquera in his place.
Although Saliba played down fears following the game, the Arsenal manager admitted he was worried about the defender’s condition.
The news of his absence has now been confirmed, leaving the Gunners without a key figure at the back.
Arteta’s defensive challenge

The setback comes after Bukayo Saka picked up a hamstring injury against Leeds United, while Kai Havertz remains sidelined following knee surgery.
Saliba had been included in the French national team squad for the international break, but he has since been withdrawn due to the injury.
His absence now means Arteta will have to depend on other defenders during a demanding run of fixtures.
Arsenal’s next Premier League game is against Nottingham Forest, before turning their attention to a Champions League meeting with Athletic Bilbao.
The club’s medical staff will be working to ensure Saliba recovers in time for the vital clash with Manchester City at the Emirates.
That fixture could have a significant say in the early title battle.
Options for the Gunners at the back

Despite the loss, Arsenal are not without alternatives in central defence. Mosquera, who replaced Saliba against Liverpool, is one option for Arteta.
Piero Hincapie and Riccardo Calafiori are also available, providing the manager with several options to fill the gap.
Saliba has been one of the most consistent players in the Arsenal line-up, forming a reliable partnership with Gabriel Magalhaes at the heart of the defence.
Losing him at this stage is a blow, but it presents others with the opportunity to step up.
Arsenal have started the season strongly, but injuries to important players always raise questions about squad strength.
The coming weeks will reveal how well Arteta’s side can cope without their influential centre-back. For now, all focus will be on managing his recovery and ensuring he returns fully fit.

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