Udinese coach Francesco Guidolin admits they must be careful with Antonio di Natale's fitness.

The veteran striker has won the Capocannoniere title for two years in a row and is on top of the charts again this season, but is also recovering from a micro-fracture to his foot.

"He needs to recuperate and can't handle three games in a week," said Guidolin.

"He can come off the bench and change the match, but in such a long and tiring campaign it is necessary to take into account the age of the players and their condition."