The Clippers' new big man might have injured his hand in the process.
The match was going fine until Gallinari took exception to an aggressive box out attempt by the Netherlands' Jito Kok and things went downhill fast.
Gallinari plays for Italy's global team and they're now preparing for Eurobasket. Once Kok took a bit of a swing in return, Gallinari fired off a strong punch at the Dutch forward's face.
With the broken hand, Gallinari will now miss the tournament and put him in jeopardy of starting Clippers training camp fully healthy.
According to USA Today, the Italian Federation said Gallinari suffered a fracture from the punch.