Aironi have been rocked by news that South African centre Dylan Des Fountain has been ruled out for the season.
Des Fountain, who joined the Italians from the Stormers in the summer, tore his anterior cruciate ligament in his left knee during the clash with Ulster on Saturday.
The injury happened in the first minute at the Stadio Zaffanella, with Des Fountain now requiring surgery to repair the damage.
"We are very sorry about Dylan," said Aironi chief executive Franco Tonni.
"With this injury, we lose a player with great qualities, both on and off the field.
"We are confident Dylan will recover, however. We expect him to have recovered by the end of June, when we will consider his possible return to Aironi."