ROME (AP) — Real Madrid castoff Jose Maria Callejon scored in the first half and Belgium international Dries Mertens added a late goal as Napoli handed Serie A leader Juventus only its second loss of the season with a 2-0 victory Sunday.
Still, Juventus has an 11-point lead over second-place Roma and is 17 points ahead of Napoli with seven rounds remaining.
In the 37th minute at the San Paolo stadium, Callejon beat Juve midfielder Kwadwo Asamoah to redirect a cross from Lorenzo Insigne from the edge of the box for his 12th goal since transferring from Madrid in the offseason.
Mertens sealed the result after collecting a long pass from Goran Pandev in the 81st and muscling off Claudio Marchisio before beating goalkeeper Gianluigi Buffon with a long bouncing shot.
Juventus, which was without suspended Serie A scoring leader Carlos Tevez, struggled to create chances. The Turin power's only other loss was a 4-2 defeat at Fiorentina in October.
Earlier, Mattia Destro's early goal was key and Roma was fortunate when a penalty kick for relegation-threatened Sassuolo was waved off in a 2-0 win.
Roma faces Parma on Wednesday in the resumption of a match from February that was stopped after eight minutes due to a waterlogged pitch.
"No other squads will be playing," Roma coach Rudi Garcia said. "We've got to take advantage of that."
Elsewhere Sunday, fourth-place Fiorentina was held to a 0-0 draw at Sampdoria.
Fiorentina winger Juan Vargas banged a free kick off the corner of the goal frame in the 78th and Sampdoria coach Sinisa Mihajlovic was sent off for protesting in the final minutes, grabbing an official's arm as he walked off the pitch.
Parma remained one point behind Inter Milan in the race for fifth and the final Europa League berth after a 3-2 loss at Lazio.
Antonio Candreva scored the winner for Lazio in added time of a match marked by poor defending on both sides.
After Lazio's Senad Lulic and Parma's Jonathan Biabiany traded goals in the first half, Miroslav Klose restored Lazio's lead in the 67th and then Lazio goalkeeper Federico Marchetti let the ball trickle in between his legs in the 81st for an own goal.