Alisson injured in 1st half of Premier League opener

Liverpool goalkeeper Alisson was helped off the pitch in the first half of Friday's Premier League opener against Norwich City.

The Brazilian, so crucial to the Reds' success last season, was seen clutching his calf before being replaced by new signing Adrian.

Alisson started all 38 Premier League matches for Jurgen Klopp's side last season, racking up 21 clean sheets.

Adrian, meanwhile, is just days removed from joining the club, having come in to replace Simon Mignolet. The veteran Spaniard was available on a free transfer after he was released by West Ham at the end of last season.