Arsenal have reacted angrily after midfielder Aaron Ramsey suffered a serious injury that echoed the broken leg sustained by team-mate Eduardo da Silva in 2008.
The Welshman appeared to have his lower leg broken in a tackle with Stoke City defender Ryan Shawcross, who was shown a red card by referee Peter Walton.
Shawcross left the field in tears, while players from both sides were visibly traumatised as medics administered emergency treatment and gave Ramsey oxygen.