Heung-Min Son's first goal of his double in the sublime 6-1 win against the Foxes took him to 21 goals for the season (14 in the Premier League) and means that for the first time, we have three players hitting 20-plus goals in all competitions in one campaign.
Harry Kane's four-goal salvo moved him beyond 30 goals again (26 in the Premier League, 32 in total) while Dele Alli already has 21 (17 in the Premier League).
We've had some close calls before. Not surprisingly, the 'double' season of the First Division title and FA Cup in 1960-61 saw four players approaching 20 goals, but only two got over the line in top-scorer Bobby Smith (33) and Les Allen (27).