Uganda, Nov. 21 -- Lionel Messi has eased worries around his fitness and insisted he feels 'very good' ahead of Argentina's World Cup opener against Saudi Arabia on Tuesday.

The seven-time Ballon d'Or winner is hoping to complete his incredible list of accomplishments by winning the tournament, but he has been training alone as a precaution after struggling with an ankle issue.

The forward's right ankle was pictured swollen in training - but Messi himself has insisted he is fine and ready to play in their opening match.

"I feel very good physically," he said. "I think I'm arriving at a great moment, both personally and physically. I don't have any problems."

According to Diario AS, Messi rejoined the rest of the team for training on M...