England legend John Barnes believes Lionel Messi's leadership is helping Argentina thrive at the 2026 FIFA World Cup, while warning that Cristiano Ronaldo's strong personality could create problems for Portugal as the tournament enters the knockout stages.

Key Takeaways

• John Barnes believes Cristiano Ronaldo's personality could create tension within the Portugal squad.
• Barnes warned that benching Ronaldo in a major knockout match could become an "accident waiting to happen."
• Lionel Messi's humble leadership style has helped unite an Argentina side that topped its group with maximum points.
• Portugal will face Croatia, while Argentina take on Cape Verde in the Round of 32.

Barnes Raises Concerns Over Portugal's Squad Dynamics

Despite Portugal advancing from the group stage with five points, John Barnes believes the team's biggest challenge may not be on the pitch.

Cristiano Ronaldo scored twice against Uzbekistan, but Barnes suggested the veteran forward's immense self-belief could create difficulties within the squad, particularly alongside influential teammates such as Bruno Fernandes.

According to the former England international, managing strong personalities could become a crucial test for Portugal's coaching staff as the competition intensifies.

Ronaldo Selection Could Become a Major Talking Point

Barnes warned that Portugal's manager could face a difficult dilemma if tactical circumstances require Ronaldo to be left out of a key knockout fixture.

He believes such a decision has the potential to create internal unrest, describing the situation as an "accident waiting to happen."

Barnes also argued that Messi's continued success with Argentina could further fuel Ronaldo's competitive drive, potentially leading to increased demands on his teammates and visible frustration if matches do not unfold as he expects.

Messi's Leadership Continues to Inspire Argentina

While expressing concerns over Portugal, Barnes had nothing but praise for Lionel Messi and the atmosphere within the Argentina camp.

The reigning world champions cruised through the group stage with maximum points, with Messi leading the way by scoring six goals in three matches.

Barnes believes Messi's humility and relationship with his teammates have created a united dressing room, where players are fully committed to supporting their captain. In contrast to Ronaldo, Barnes suggested Messi's calm approach helps maintain harmony within the squad rather than creating tension.

Knockout Stage Set to Test Both Giants

Both footballing giants now face crucial Round of 32 encounters that could define their World Cup campaigns. Portugal will take on Croatia, with Ronaldo's role expected to remain under close scrutiny as the stakes continue to rise.

Meanwhile, Argentina head into their meeting with Cape Verde full of confidence after an impressive group-stage campaign, with Messi once again leading a side that Barnes believes is united in its pursuit of World Cup success.