The only players who managed five goals in a UEFA Champions League game are Luiz Adriano in Shakhtar Donetsk's 7-0 win over BATE Borisov in 2014 and Lionel Messi for Barcelona against Bayer Leverkusen in 2012.
Haaland's 33 goals in 25 Champions League games make him the youngest player to reach the 30-goal mark in the competition's history, and he did so in the fewer games (25) than any other player.