Christopher Nkunku will not travel with the Milan squad for Wednesday's friendly against Celtic in Glasgow, according to Calciomercato.com.
For two of the summer's higher-profile arrivals, missing a warm-up game in Scotland is not a headline on its own. What makes it worth noting is timing. Milan are about to head off on their Asia-Pacific tour, and pre-season is exactly when Amorim needs eyes on his new signings to sort out roles before the campaign starts. Every session missed now is a session he doesn't get back.
Nkunku has picked up a muscle strain, per Calciomercato.com, and the club is expected to give a clearer read on his condition before the trip east. A muscular problem this early is the kind of thing you monitor rather than panic over, but the Frenchman arrived to fix Milan's shortage of quality behind the striker, so any lost time matters.
The friendly itself is more about fitness and a look at the youngsters than the scoreline. Celtic are further along in their preparation as reigning Scottish champions, so the result carries little weight. Amorim has called up a long list of academy names alongside Francesco Camarda and Christian Comotto, both of whom put pen to new deals in the last few days: Borsani, Bouyer, Kostic, Ossola, Vladimirov, Vos, Pittarella and Guernier all make the trip.
The gap the source leaves open is Estupinan. No reason has been attached to the full-back's absence in the same detail, which suggests it may be management rather than injury, but Milan will need to confirm that before the tour departs.
Amorim will learn more from watching his kids at Celtic Park than from the final whistle, and the fitness updates on Nkunku and Estupinan are the ones to watch before the plane leaves for Asia.