Lionel Messi is big enough that he trained solo as the defending World Cup champion Argentina held its first practice in the U.S. The Inter Miami captain has been struggling with fatigue in his left hamstring since May 24 but should be fit for Argentina's World Cup opener against Algeria in Kansas City on June 16. Messi, 38, went to Argentina's training base in Kansas City on Monday and did "targeted work" with a number of team mates also nursing fitness issues. Argentina's