David Beckham sprained his right ankle in training Tuesday and is in doubt for AC Milan's home game against Siena on Sunday, the club said.
Milan on Sunday marked the extension of Beckham's loan from the LA Galaxy until the end of the season by beating Atalanta 3-0.
Beckham joins a long injury list including Kaka, Ronaldinho, Bonera, Nesta, Senderos, Kaladze, Gattuso and Emerson.
