Siena president Massimo Mezzaroma has warned Alberto Malesani he is considering a change.
Mezzaroma is furious after their performance in defeat to Sampdoria.
"I do not want compliments, but I would like some more yellow cards, commitment, desire, anger," rapped Mezzaroma. "I think that even if we were already relegated, we should continue to fight, not to finish last. In sport, even when you're ruled out mathematically, you must honor the jersey, honor the salary, to honor the city."
Then he added: "We must consider how to give a jolt to the environment."