West Ham have signed Edson Alvarez from Ajax on a $41.9 million transfer fee.

We're really pleased to add Edson to our squad," West Ham manager David Moyes said after his first signing of the summer transfer window.

"The midfield area was one we were especially keen to strengthen this summer, and Edson will complement the other options we have in that department.

"He's an experienced international player who has enjoyed great success for both club and country during his career to date."