Pedro has scored 10 goals for Lazio in Serie A this season
Inter Milan missed the chance to go top of the Serie A table heading into the final day as a 90th-minute Pedro penalty denied them victory over Lazio.
With leaders Napoli held to a goalless draw at Parma, Simone Inzaghi's Inter were on course to go a point clear when Denzel Dumfries gave them a 2-1 lead in the 79th minute.
But substitute Pedro scored his second goal of the game from the spot to deny them the three points, after Valentin Castellanos' shot struck the arm of Yann Bisseck.
Bisseck had given Inter the lead at the end of a cagey first half, only to see his goal cancelled out by former Barcelona and Chelsea winger Pedro.
Champions League finalists Inter, who will make the trip to 10th-placed Como - managed by Cesc Fabregas - on the final day, will need Napoli to drop points against Cagliari, who sit 14th, to stand a chance of defending their league title.
Inter had reduced the gap to Napoli to a single point last weekend after beating Torino 2-0, while the Serie A leaders dropped points in a 2-2 draw with Genoa.
Looking to apply more pressure on Antonio Conte's frontrunners on the penultimate matchday, Inter, however, had their work cut out against fifth-placed Lazio in Milan.
They had to wait until the half-hour mark to register their first shot on target through Federico Dimarco, who produced a brilliant save from Christos Mandas, while they also had shouts for a penalty waved away by referee Daniele Chiffi after Nicolo Rovella's push on Bisseck.
But the Nerazzurri had Yann Sommer to thank for not falling behind as the Inter goalkeeper denied Gustav Isaksen in a one-on-one situation, after the Danish striker was played through by Matteo Guendouzi four minutes before the break.
The tense crowd in Milan erupted in joy in the first-half stoppage time as Bisseck pulled Inter ahead on the rebound after Dimarco's initial effort was blocked in front of the goal by Alessio Romagnoli.
Despite the advantage, the hosts were pushed on to the backfoot in the second half by Marco Baroni's Lazio, who dominated possession and chances.
Both Inzaghi and Baroni were sent off as tempers flared in the closing stages of the match, before former Stoke and West Ham forward Marko Arnautovic was ruled offside after finding the back of the net in stoppage time.
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