Upcoming fixtures across Italy's leagues are in doubt, with Serie A leaders Juventus scheduled to host Inter in Turin on March 1.
There is no timescale on Marcelo Brozovic's return to action after tests showed he has sprained his left ankle.
Inter's intensity dipped at Lecce, prompting a disappointing and potentially costly Serie A draw and a warning from Antonio Conte.
Alessandro Bastoni's first Inter goal was not enough to see off Lecce, who battled to a draw, ending their four-match losing run in Serie A.
Jose Mourinho and Antonio Conte clashed during their time in England and the Inter boss was forced to respond to criticism from his rival.
Juventus boss Maurizio Sarri gave an encouraging update on Gonzalo Higuain's welfare after the 1-1 draw away to Lecce.
Juventus were forced to rue wasteful finishing as they could only manage a draw away to Lecce on Saturday.
Maurizio Sarri has placed plenty of faith in Miralem Pjanic at Juventus but could now be without the midfielder for a time.
Stefano Pioli reflected on his first match in charge of AC Milan – a 2-2 draw at home to Lecce.
AC Milan were held to a dramatic 2-2 draw at home to Lecce in Stefano Pioli's first match in charge at San Siro.