Uruguay's national soccer team striker Luis Suarez participates in a team training session at the team's headquarters in the outskirts of Montevideo in this October 7, 2013 file photo. Suarez is to have surgery on his knee on the morning of May 22, 2014, just over three weeks before the start of the World Cup, according to local media reports. Suarez helped Uruguay to fourth place at the last World Cup in South Africa four years ago and was expected to play a key role in the country's campaign at the June 12-July 13 tournament in Brazil. REUTERS/Andres Stapff