Throughout the first half at Eden Arena in Prague, plastic pint glasses were thrown from the West Ham end.
Biraghi, the captain of Fiorentina, was struck by another object as he attempted to take a corner kick shortly after the half-hour mark, prompting Carlos del Cerro Grande to stop play ultimately.
The back of Biraghi’s skull was cut, requiring medical attention and a bandage.
Before play resumed with the score still 0-0, a message was broadcast over the PA system urging fans to stop hurling objects onto the field and to respect the players.
