Serie A: Napoli shock Juventus on Maurizio Sarri's return; Cagliari dent Inter Milan’s title challenge

Serie A leader Juventus lost 2-1 at Napoli on Sunday in a miserable return for former coach Maurizio Sarri, and a poor day for its title challengers too.

Piotr Zielinski and Lorenzo Insigne scored in the second half to inflict Juve’s second league defeat of the season, and end Napoli's three-match losing streak in Serie A. But Juventus only saw its lead cut to three points after Inter Milan drew 1-1 earlier in the day against Cagliari.

Third-place Lazio is five points behind Juventus but with a match in hand after it also drew 1-1 against Roma in the capital derby.

It was Sarri’s first match back at Napoli since leaving in 2018 after three seasons in charge of the southern-based club and he was greeted by jeers.