Arsenal centre-back Ben White is facing a lengthy layoff after suffering a 'significant' medial ligament injury during the Gunners' 6-0 thrashing of West Ham United on Saturday.
The 26-year-old defender was forced off the pitch in the 18th minute of the match at the London Stadium, with the injury now confirmed to rule him out for the remainder of the Premier League season and the upcoming FIFA World Cup.
White's injury is a significant blow to Arteta's side, who are currently fifth in the Premier League table and still harbour hopes of qualifying for the Champions League.
In a statement, the club confirmed that White will undergo surgery to repair the damage, with a recovery time estimated to be 'several months'. The news is a major setback for the England international, who was tipped to play a key role for Gareth Southgate's side at the World Cup in Qatar.
Arsenal are yet to confirm how they will replace White, but the injury could pave the way for a new signing before the summer transfer window closes.