Bundesliga side 1. FSV Mainz 05 will be without United States international Conor Casey for six months after the 23-year-old striker tore the cruciate ligament in his right knee during his country's 4-1 victory against Cuba last Thursday.
A scan confirmed the extent of the injury at the weekend and Casey will remain in America for surgery, which is expected to take place this week.
UEFA Cup test
Casey was unable to hold down a regular place in Jürgen Klopp's side last season - completing just seven matches from 28 Bundesliga appearances - and has been linked with a move away from Mainz. He now misses the club's first-ever match in European competition, at home to Armenia's FC MIKA in the UEFA Cup first qualifying round on Thursday.
©UEFA.com 1998-2013. All rights reserved.