The Reds boss is having to contend with a number of absentees and rejigged his line-up for the Europa League draw at Fenerbahce, before Antony was forced to leave the field on a stretcher late on.
Although there is no update yet on the Brazilian, the injury issues prompted a question in the manager's press conference ahead of the weekend encounter with West Ham United in the Premier League.
Erik conceded that being unable to select from a full squad is, naturally, impacting on performances and all the staff have to do better to remedy the problem, even if a lot of it can clearly be down to misfortune.