Liverpool midfielder Alex Oxlade-Chamberlain will miss the rest of the season as well as the Russia 2018 World Cup, the club announced on Wednesday. The former Arsenal player was forced out from the field after 18 minutes of Liverpool’s 5-2 victory in the Champions League semi-final first leg at Anfield on Tuesday. “Liverpool FC can confirm Alex Oxlade-Chamberlain’s 2017-18 season is over for both club and country due to a knee ligament injury sustained against AS Roma on Tuesday evening,” Liverpool stated on their official website. “The extent of the injury means Oxlade-Chamberlain is set to miss the remainder of the campaign for Liverpool, as well as the World Cup finals in Russia with England. “The 24-year-old was assessed by the club’s medical team at Melwood on Wednesday morning and no specific timescale is being placed upon his return to action at this stage. “However, Oxlade-Chamberlain will now begin a rehabilitation programme to enable him to reach full fitness again as soon as possible, returning to action next season.” He joined Liverpool from Arsenal this season and has excelled after a slow start.