What happened: ESPN's Ale Moreno said a second consecutive World Cup title would strengthen the case for Messi's title defense as proof he is the greatest athlete of his generation. Argentina enters Sunday's final as the defending champion.

Why it matters: A back-to-back World Cup would be a rare feat, adding to a debate that already includes his prior title, his Ballon d'Or collection and his World Cup goal-scoring record. The comparison Moreno raised is squarely about legacy, not just this tournament's outcome.

What to watch: Argentina's final is set for 3 p.m. ET in New Jersey.