Arsenal manager, Mikel Arteta, is keen on signing John Stones or Ezri Konsa, following news that William Saliba will be out for an extended period.
Saliba has opted not to have surgery after injuring his back while playing for France at the 2026 World Cup.
But the 25-year-old defender is facing a lengthy period of rehabilitation.
Stones is available as a free agent, after he left Manchester City at the end of his contract.
The 32-year-old worked with Arteta during his time as assistant to Pep Guardiola at City.
Konsa, who represented England alongside Stones at the World Cup, has two years left on his contract at Aston Villa.
Both players can also operate at right-back.