Liverpool expect to be without attacking midfielder Philippe Coutinho until the end of October after announcing on Wednesday that he is to undergo surgery on a shoulder injury. The 21-year-old Brazilian sustained the injury in a challenge with Swansea City centre-back Ashley Williams during Liverpool\'s 2-2 English Premier League draw at the Liberty Stadium on Monday. \"Liverpool have confirmed Philippe Coutinho will undergo a procedure on the shoulder injury he sustained in Monday evening\'s 2-2 draw with Swansea City,\" the club said in a statement. \"After being assessed by the Reds medical staff, it\'s been decided that Coutinho will now have surgical stabilisation on the AC joint in his shoulder. Liverpool hope to have the 21-year-old back in contention again towards the end of October.\" Coutinho\'s period of unavailability means he is likely to miss league games against Southampton, Sunderland, Crystal Palace, Newcastle United and West Bromwich Albion, as well as next week\'s League Cup tie at Manchester United. Source: fifa