Summary
Lautaro Martinez's first-half brace put Inter Milan top of Serie A Sunday with a 2-1 win over SPAL after champions Juventus were held 2-2 at home by Sassuolo.
Cristiano Ronaldo scored from the spot to rescue a point but Juventus slipped one point behind Antonio Conte's Inter Milan.
Argentine Martinez put Inter ahead after 16 minutes at the San Siro, and then connected with Antonio Candreva's cross before the break to head in his eighth league goal this season.
Sassuolo, in 12th, claimed their first-ever point at Juventus, and held Sarri's unbeaten champions to their third draw of the season.
Lazio consolidated third place -- seven points behind Inter -- with a 3-0 victory over Udinese thanks to a double from Serie A top scorer Ciro Immobile, including one from the spot, to bring his tally to 17 goals this season, and a Luis Alberto penalty.
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