Lionel Messi has played 12 World Cup knockout games. In those matches, he has scored 6 goals and provided 5 assists.

A couple of sources from earlier tournament coverage reported lower totals before later World Cups were added, but the up-to-date knockout count is 12.

Quick note

  • Knockout games: 12
  • Goals in knockout games: 6
  • Assists in knockout games: 5

TL;DR: Messi has played 12 World Cup knockout games.