Will Lionel Messi finally score in the knockout round at the World Cup?

If you've heard anything about the upcoming World Cup in Qatar, it's probably that it's going to be Lionel Messi's swan song. But what you might not know is that the Argentinian has a few milestones he has yet to reach on the World Cup stage -- and this may be his final chance.

Despite being one of the best players in the world and scoring six times in World Cup matches, Messi -- along with fellow superstar Cristiano Ronaldo -- has never scored a goal in the knockout stage of a World Cup.