Boca Juniors striker Santiago Silva (pictured right) has joined the Argentine champions' growing injury list after breaking two fingers in a fist-fight with fans of first division rivals Tigre.

Fans insulted the shaven-headed Uruguayan nicknamed "El Tanque" (Tank) and other players as the team were boarding their bus after losing 2-1 at Tigre on Sunday, media reported.

Boca could face sanctions for their players' reaction and Tigre also for no police presence where the team bus was parked.

It was Boca's first defeat in 19 away matches while the home side ended a run of three losses with their first win in five games.

Silva, seen at Boca's Casa Amarilla training facility adjacent to the Bombonera with his right arm in a splint on Monday, was also treated for a knock on his knee.

"Sorry, I've got a splint," he told disappointed fans seeking an autograph.

Defender Facundo Roncaglia and midfielder Leandro Somoza are out for at least three weeks with pulled leg muscles, although captain Juan Román Riquelme is available again after injury.

Coach Julio César Falcioni is set to field several reserves at home to Venezuela's Zamora in their last Copa Libertadores group match fixture. They have already qualified and only top place in the group is at stake with Fluminense of Brazil, who visit Arsenal de Sarandí a few kilometres from the Bombonera, two points ahead of Boca.