Hakan Calhanoglu went from hero to villain as Inter drew 1-1 with Serie A title rivals Napoli, scoring a stunning equaliser then missing a late penalty.
Inter had fallen behind against the run of play in the 23rd minute, with Scott McTominay continuing his fine form by poking home from close range after a Napoli corner was flicked on.
Two minutes before the break, Calhanoglu equalised with a powerful strike from outside the box, which beat Napoli goalkeeper Alex Meret before nestling in the top corner.
The Turkey international, who had scored 17 successive spot-kicks in the league for Inter, then had the chance to win it in the 74th minute after Andre-Frank Zambo Anguissa fouled Denzel Dumfries.
However, he left San Siro in stunned silence when he hit the post from 12 yards, ensuring the two Scudetto contenders had to settle for a point apiece.
Napoli top the table with 26 points from 12 games, while Inter sit fourth with 25, with the Nerazzurri also behind Atalanta and Fiorentina on goal difference.
Data Debrief: Nothing to separate title rivals
Napoli may have retained their slender lead at the top of Serie A, but their failure to take all three points ensured Atalanta and Fiorentina ended the matchday two points closer than they started it.
The Partenopei have gone two straight games in Serie A without winning for the first time under Conte, having also lost 3-0 to Atalanta last time out.
They have, however, remained unbeaten in their last two games against Inter when starting the matchday top of Serie A (one win, one draw), after two such defeats versus the Nerazzurri. If the teams are to go head-to-head for the title, this could prove an important point.
