Photo credit should read BEN STANSALL/AFP via Getty ImagesLionel Messi and Cristiano Ronaldo have defined an era of international football, but questions are now emerging about how they fit into their national teams at this stage of their careers.With both players continuing to represent Argentina and Portugal, the challenge is no longer about their greatness, but about how to best utilize it.And according to one football expert, the answer requires careful balance rather than drastic conclusions.Photo credit should read PAUL ELLIS/AFP via Getty ImagesAndy Brassell explains the challenge of fitting Messi and Ronaldo into modern squadsSpeaking to talkSPORT, Andy Brassell pointed out that both nations are capable of thriving even without their iconic stars.“They both know they can put out a very good, very effective, very fluent team, without their most famous player ever,” Brassell said.He added, “I think it’s going to take a bit of wit and a bit of bravery to use Ronaldo and Messi in the right way, to get the most out of them, but also get the most out of the team.”The point reflects how Argentina and Portugal have evolved, building deeper squads that are no longer entirely dependent on a single individual.That evolution, however, creates a new kind of decision-making challenge for managers.Why smart management is key to maximising Lionel Messi and Cristiano Ronaldo’s impactBrassell was clear that the conversation should not be misinterpreted as criticism of either player’s ability.“I’m not sitting here saying these guys have become a hindrance, that’s wrong to say that, but I do think there needs to be sensitivity and smarts to the way you’re going to use them,” he continued.“Particularly, if the weather conditions are going to be tough,” Brassell concluded.Instead, the focus shifts to context, game state, opposition, and even physical demands, all of which now play a larger role in determining how and when they should be used.Both players still bring unmatched experience and moments of brilliance, but modern international football increasingly demands flexibility across the entire squad.Managing that balance could ultimately define how successful Argentina and Portugal are in upcoming tournaments.Read more:Pennsylvania Governor offers free transport to World Cup fans amid NJ Transit controversyGovernor Mikie Sherrill targets FIFA’s parking decision at MetLife Stadium amid Transit controversyFIFA slams New Jersey Governor’s defense of Transit price with a ‘chilling’ response