Ashley Williams has thanked staff at a Los Angeles hospital for their care after he suffered a collapsed lung while playing for Wales against Mexico in the city on Tuesday.
Wales captain Williams also sustained two broken ribs in a collision with Mexico striker Javier Hernandez that forced him to leave the pitch after 17 minutes of the first half.
Writing on his Facebook page, the Everton defender said: "Crazy couple of weeks. Great to be back in a Wales shirt & with the lads. However, after coming off after 20 mins with multiple breaks on two ribs, I went to hospital & found out I had punctured my left lung, which led to it collapsing."
Williams, who is still in America after undergoing surgery, added: "I would like to say a huge thank you to all the staff at Ronald Reagan UCLA hospital in Beverley Hills for looking after me and making sure surgery went as comfortable as possible. Look forward to flying home & resting up now before the new season!"
The game against Mexico was the first Williams had played for almost three months after injury problems ended his club season early.