Alisson has warned Liverpool that opponents may have worked them out after the Reds were beaten 2-1 at Manchester United on Monday night.
Jurgen Klopp's side were second-best from the get-go and fell behind courtesy of Jadon Sancho's 15th-minute strike. It means that the Reds have conceded the first goal in seven successive Premier League matches, stretching back to the 1-1 draw with Tottenham back in May.
Although Liverpool grew into the game, they were undone on the counter-attack just after half-time as Marcus Rashford doubled United's lead, coolly slotting home past Alisson. The Reds pulled one back in the 81st minute through Mohamed Salah, but it was too little, too late as Liverpool suffered their first defeat of the season.