Inter scored just one goal for the 12th time in 15 Serie A matches this season, but it proved to be enough to send it to the summit.
Inter moved to the top of Serie A despite finishing the game with 10 men as Adem Ljajic proved decisive in a 1-0 win over Genoa at San Siro on Saturday.
Roberto Mancini's team jumped above Napoli in the standings with the victory, though Maurizio Sarri's men could displace Inter if they win away at Bologna on Sunday.
Genoa has not won away at Inter since March 1994 and it never really looked like getting the result this time around as it showed minimal desire to attack.