Inter Milan missed a chance to keep the pressure on Juventus after being held 2-2 at Roma, leaving the way clear for the Turin giants to close in on a ninth consecutive Serie A title.
Romelu Lukaku's penalty two minutes from time rescued a point for Antonio Conte's Inter, who are second, five points behind Juventus.
Juve can open up an eight-point lead on the top of the table when they host fourth-placed Lazio on Monday.
Stefan De Vrij had got Inter off the mark at the Stadio Olimpico when he headed home an Alexis Sanchez corner after 14 minutes.
But Roma captain Edin Dzeko set up Leonardo Spinazzola for the equaliser in first half stoppage time and was again involved when Henrikh Mkhitaryan got the second in the 57th minute.
Lukaku came off the bench and scored from the spot late after Spinazzola fouled Victor Moses.
It was a stalemate which does little to help either team, and boosts Juventus' chances of extending their record Serie A run.
At the bottom of the table Brescia, in 19th, won 2-1 to condemn SPAL to a return to Serie B after two seasons in the top flight.
In another relegation dogfight Genoa beat Lecce 2-1 to move four points clear of the southerners who occupy the final relegation spot.
Genoa are four points behind Torino, who lost 2-0 at Fiorentina.
City rivals Sampdoria are on the brink of securing Serie A survival after staging a thrilling comeback from two goals down to win 3-2 at Parma.
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