What is Lionel Messi's greatest season of all time?

2018–19 Season

Messi scored 51 goals and won La Liga and Copa del Rey, claiming his sixth Ballon d'Or in a dominant return to form after injury.

2016–17 Season

Messi netted 54 goals, claimed his fourth Pichichi award and European Golden Shoe, and provided 16 assists in one of his most complete all-round seasons.