West Ham United striker Andy Carroll has undergone the knee surgery that is expected to sideline him for the rest of the season.

The 26-year-old suffered medial ligament damage in the 0-0 draw with Southampton last week and stayed on as the Hammers had used all of their substitutions.

Carroll missed the first three months of the campaign with a foot problem, but remains upbeat despite another fitness setback.

He tweeted on Tuesday: "Today's surgery went great and glad to be put back together into one piece!"

Carroll has scored five goals in 16 appearances in all competitions for West Ham this term.