Arsenal's defensive resources have been stretched to breaking point after summer signing Cristhian Mosquera became the latest centre-back to be struck down by injury.
Fresh Blow in Brentford Clash
The setback occurred during the Gunners' Premier League fixture against Brentford on Wednesday, 3 December 2025. Mosquera, who joined from Valencia in the summer, was forced off the pitch just before half-time after an awkward landing from an aerial challenge.
His premature exit compounds a severe shortage at the heart of the defence for manager Mikel Arteta. The Spaniard is already without his established first-choice pairing, leaving the squad's depth critically tested.
Existing Concerns Mount for Arteta
The situation surrounding the other absent defenders presents a mixed picture. Arteta has described William Saliba's issue as a minor 'niggle' and is hopeful the Frenchman could return to action within days.
However, the prognosis for fellow centre-half Gabriel Magalhaes is far more concerning. The Brazilian is struggling with a thigh injury that could sideline him until after the Christmas period, a significant blow to the team's stability.
Timber Steps In as Villa Test Looms
Jurrien Timber was the man introduced to replace the stricken Mosquera at the Gtech Community Stadium. This developing crisis now throws Arsenal's preparations for their next match into disarray.
The club faces a formidable challenge this weekend with a fixture against high-flying Aston Villa. Arteta must now find a viable solution to his potential centre-back shortage, with the team's defensive solidity under serious threat.
This series of injuries threatens to derail Arsenal's Premier League campaign at a crucial point in the season, forcing the manager to explore unconventional partnerships at the back.
