Napoli moved 10 points clear at the top of the standings after snapping Juventus's eight-match Serie A winning streak.
Napoli are still top of the table with 41 points after 16 games but their advantage over second-placed AC Milan, who beat Salernitana 2-1, narrowed to five points.
Rangers defied UEFA on Wednesday by playing Britain's national anthem ahead of their Champions League match against Napoli as a mark of respect for Queen Elizabeth after her death last week.
Napoli stayed on top of their Champions League group as Matteo Politano's penalty and late strikes by Giacomo Raspadori and Tanguy Ndombele sealed a 3-0 victory over 10-man Rangers at Ibrox on Wednesday and maintained their unbeaten start.
In the heat of southern Italy, though, Liverpool produced their worst performance of the campaign, with even basic defending and midfield pressing lacking.
Chasing a first league crown since the days of Diego Maradona, a sold-out stadium which bears their hero's name will host two teams locked on 57 points.
Napoli emerged with a lot of credit from last week's 1-1 draw at the Camp Nou which leaves the tie on a knife-edge.
The Catalans crashed out of the Champions League in the group stage with just two goals scored in six matches.
Dinamo Zagreb sealed a playoff berth in the Europa League knockout stages after a stunning early goal from Mislav Orsic gave them a 1-0 win.
Former Boca Juniors, Naples and Barcelona players died of a heart attack on November 20th last year.
Five South American Juventus players will stay at home and rest instead of travelling to face Napoli.
Just three points separate second-placed Atalanta and Juventus in fifth with two games left to play.
Milan were top of the league at the halfway point in January for the first time since 2011, the year they went on to win their 18th and last Scudetto
“Sometimes they love me, but I bet that sometimes they take out my picture in the morning and spit in my face,” said Gattuso.
Lawyers are gearing up to do battle over the estate of Diego Maradona, estimated at between $10 million and $40 million.
The stadium has been officially renamed the Diego Armando Maradona Stadium after the late striker who led them to their only two Serie A titles and the UEFA Cup.
Fans streamed to Napoli stadium on Thursday to pay their respects to Diego Armando Maradona, grieving a man who achieved god-like status in the Italian city.
He is a national hero for Argentina and its passionate people but he was also a hero for every football fan.
Maradona is to be kept in hospital for several more days after suffering from “confusion” caused by an unexplained “abstinence” that followed his brain surgery.
The pair formed the backbone of a memorable AC Milan team for more than a decade and helped Italy win the 2006 World Cup.