Manuel Lazzari scored an own-goal and Lazio gifted Adrien Tameze the winner in Rome. Felipe Caicedo had equalized for the capital side early in the second half.
Serie A: Miss-and-hit Zlatan Ibrahimovic salvages point for AC Milan; Juventus, Inter Milan also held
Ronaldo had opened the scoring after a quarter of an hour but the Serie A champions let the game slip when the Portugal star limped off with an ankle sprain and Caicedo fired in five minutes into injury time.
Ciro Immobile and Felipe Caicedo, who between them have provided 37 of second-placed Lazio’s 66 Serie A goals this season, are suspended due to an accumulation of yellow cards.
Serie A: Ciro Immobile scores as rampant Lazio beat Genoa to stay hot on trail of leaders Juventus, AS Roma end losing run
Lazio, on 59 points from 25 games, stayed one point behind the Turin side as they equalled their points tally for the whole of last season, when they finished eighth, and extended their unbeaten run to 20 league games, including 16 wins
Napoli alleviated their crisis when an early solo goal by Lorenzo Insigne gave them a 1-0 win over holders Lazio in their Coppa Italia quarter-final on Tuesday, which also featured a bizarre penalty miss by Ciro Immobile for the losers.
Serie A: Lazio's Luis Alberto, Felipe Caicedo score in stoppage time to seal dramatic victory against Cagliari
Third-placed Lazio scored twice in added time as they came from behind to snatch a dramatic win 2-1 at Cagliari in Serie A on Monday and notch their eighth successive league win.
Serie A: Chris Smalling sparks with all-round display as Roma rout Brescia; Lazio's Felipe Caicedo scores late winner against Sassuolo
Smalling scored one goal and set up two others in Roma’s 3-0 win over last-place Brescia in Serie A on Sunday.
Serie A: Felipe Caicedo, Ciro Immobile score as Lazio beat Roma; AC Milan continue impressive run with win against Sassuolo
Lazio made their rivals pay 18 minutes from time, as Immobile scored his 16th goal of the campaign only eight minutes after coming on as a substitute
Serie A: Lazio ride on Felipe Caicedo's strike to down struggling Empoli, move into Champions League places
Felipe Caicedo scored from the spot as Lazio moved fourth and into the Champions League places on Thursday with a 1-0 win over struggling Empoli in Serie A.
Jorginho fired Napoli back top of Serie A on Sunday with a 1-0 win at Udinese as champions Juventus returned to winning ways 3-0 against Crotone.
FIFA World Cup 2018 qualifiers: Ecuador coach Gustavo Quinteros urges team's unfancied players to take charge
Ecuador coach Gustavo Quinteros has urged his team's lesser known players to take greater responsibility as they attempt to secure a berth in FIFA World Cup 2018