The famous statistics website Opta has posted many interesting stats in Liverpool match vs Norwich.
5 - Trent Alexander-Arnold is the first player to register an assist in five consecutive Premier League appearances since Mesut Özil in 2015, and is one of only eight players to do so in Premier League history.4 - Liverpool are the first team to score 4+ first half goals on MD1 of a Premier League season since August 2006, when Man Utd netted four against Fulham.
12 - Since the start of the 2017-18 season, only Neymar (13) has scored and assisted in more games in the top five European leagues than Liverpool's Mohamed Salah (12).
21 - Mohamed Salah has now scored against 21 of the 23 different opponents he's faced in the Premier League for Liverpool - only failing to score versus Manchester United (4 games) and Swansea City (2 games).
2 - For only the second time in Premier League history, the first goal of the season has been an own-goal - the other was in 2015-16 (Kyle Walker, for Spurs v Man Utd).