Fiorentina have missed the chance to go five points clear of the Serie A relegation zone after being held to a goalless draw by Palermo at Stadio Artemio Franchi.
Defender Matija Nastasic came the closest to breaking the deadlock when his fifth-minute header rebounded of the post following a Houssine Kharja cross.
Emiliano Viviano played a starring role in the visitor's goal, showing impressive athleticism to deny Stevan Jovetic, Valon Behrami and Amauri.
Jovetic had a golden chance to win the game late on, but he miskicked and sent his shot wide from six yards.