West Ham treated Fiorentina like "animals" in their Europa Conference League final success, says the Italian club's president Rocco Commisso.
Striker Luca Jovic had to come off at half-time with a broken nose, while left-back Cristiano Biraghi was left with a bloodied face after being hit by an object thrown from the crowd.
Jarrod Bowen's late winner saw West Ham end a 43-year wait for a trophy.
"I expected to win, but it wasn't like that," Commissio said.
"But there have been episodes on the pitch where the referee had to make the difference.