Gianluigi Donnarumma has been ruled out for at least another month with a knee injury, according to reports from Italian media.

The Serie A club Inter Milan confirmed the news on Wednesday afternoon, with Donnarumma having undergone surgery on his right knee last week and expected to be sidelined for several months.

Donnarumma was one of Italy's most prolific goalscorers during his time in Serie A, but he had been struggling recently due to injuries to his ankle and hamstring.

He missed Inter's match against Juventus in the Coppa Italia final last season, and is now set to miss out on another Champions League tie against Manchester United this weekend.

It is not yet clear when Donnarumma will return to action, but it is likely that he will need some time off to heal before returning to training and play for the national team.

Inter have already announced that they will not be able to sign any new signings until after the summer transfer window opens next month, which means that Donnarumma's absence could affect their plans for the rest of the season.

The loss of such a key player for Inter would be a significant blow, as they look to build on their impressive form under manager Antonio Conte in the upcoming campaign.