Former England striker Michael Owen - who ruptured his cruciate ligament during a 2006 World Cup match - wished Theo Walcott a "speedy recovery" from the same injury.
Shocking news regarding Theo Walcott. I wish him a speedy recovery and hope he returns next season as good as ever.
Walcott's Arsenal teammate Aaron Ramsey echoed Owen's sentiments:
Gutted for Theo, he'll come back stronger after this. Been fantastic for us so far this season. Have a speedy recovery mate
England goalkeeper John Ruddy suggested Walcott's injury could present an international opportunity for his Norwich teammate Nathan Redmond.
Gutted for Walcott missing the World Cup but what a chance for other players to step in! ( @nathanredmond22 )