Luciano Spalletti's team, who have a huge lead over their rivals at the top of the table, needed only to beat Salernitana to secure their first crown since 1990, when they were inspired by Diego Maradona.
The late Argentine great also led them to their first title in 1987. A win against Salernitana would have been enough to nail down their third title with six games left to play after Inter Milan beat closest challengers Lazio 3-1 earlier in the day.
But the Scudetto celebrations have been put on ice for at least a few more days after Boulaye Dia's brilliant 84th-minute strike grabbed a point for Salernitana.
It cancelled out Mathias Olivera opener on 62 minutes. The hosts had dominated possession but struggled to create chances until Olivera headed home Giacomo Raspadori's corner.