Fiorentina coach Cesare Prandelli fears they're suffering fatigue after their 1-1 draw with Parma.
Lorenzo De Silvestri opened the scoring for Fiorentina before Valeri Bojinov, on-loan from Manchester City, was again on the scoresheet for Parma.
"We took part in a great game with two teams who tried to win right to the end. It was a real battle," said Prandelli.
"We faced this match with the right level of concentration. Parma are relaxed in mid-table and have no pressure on their shoulders, whereas we are targeting Europe and couldn't afford too many risks.
"Parma played with more courage after the break, but I cannot complain about my players today. We will begin again with more belief."