The report says Messi worked separately from the main group in the opening session while continuing specific recovery work.
That matters because Argentina do not need their captain flat-out in the first practice of the week. They need him sharp when the tournament starts. For an older elite forward, managing sprint volume and repeated accelerations is often the difference between a minor concern and a major absence.
Even now, Messi remains the reference point for Argentina’s attack. He shapes tempo, draws defenders and changes how opponents set their block. If he is limited, the whole attacking rhythm changes.
But Argentina are also better equipped than they once were to protect him. The wider structure under Lionel Scaloni has been built around compactness, midfield legs and runners beyond the ball. That gives the holders room to be patient this week rather than forcing their captain through full sessions for the sake of optics.
The key is not Monday’s workload; it is how Messi progresses over the next several days. The update says there is no immediate alarm, and that is the line Argentina will want to hold onto before their final warm-up against Iceland on 9 June.
From here, every training sighting will be scrutinised. The storyline to watch is simple: not whether Messi trains alone once, but whether Argentina can keep the risk low and have him ready for Algeria when the World Cup begins.