The FIGC said in a statement they had "opened an investigation into Lazio to ascertain any violations of the health protocols aimed at containing the Covid-19 epidemic".
The new decree says professional games are allowed in outdoor venues “without fans in attendance.”
Serie A: Paulo Dybala stays, Gonzalo Higuain out as Andrea Pirlo vows to bring joy back to tired Juventus
On his appointment, Pirlo said: "I think I'm in the right place at the right time. I want to bring back to Juventus some of that enthusiasm that has been lacking recently."
Donadoni took over at Shenzhen in July 2019 when they were already deep in relegation trouble and he was unable to prevent them dropping out of the CSL.
Ronaldo had struggled since football resumed in Italy, but his return to form pushed Juventus seven points clear of second-placed Lazio, who hosts Fiorentina on Saturday.
Italy's rules mandate that the entire squad must be quarantined for 14 days should a player test positive for coronavirus. This puts the Serie A, which resumes on 20 June, on shaky ground.
Serie A was suspended on 9 March and the Italian government will decide on Thursday whether it will give its permission for the championship to restart, playing matches without spectators.
Coronavirus Outbreak: Serie A promises constructive dialogue with government as uncertainty continues
Serie A has been suspended since 9 March because of the coronavirus outbreak and sports minister Vincenzo Spadafora said on Wednesday that he thought it was unlikely the season could be completed
Italian PM Giuseppe Conte says professional sports teams can start training in May, no date for Serie A restart
Italian Prime Minister Giuseppe Conte gave the go-ahead on Sunday for professional sports teams to start training again in May following the novel coronavirus outbreak but did not set a date for soccer’s top-flight Serie A championship to resume.
Italy’s football federation has begun to draw up medical guidelines for a possible restart of Serie A, which has been suspended since 9 March because of the coronavirus outbreak.
Sporting events in Italy, including Serie A matches and Tokyo Olympics 2020 preparatory events, to be halted due to coronavirus
Sports ground to a halt throughout Italy late Monday night when Premier Giuseppe Conte announced that games and travel will be banned nationwide.
The Italian government is moving toward having football matches played behind closed doors in affected areas as authorities try to contain a spreading virus that has made northern Italy the focal point of the outbreak in Europe.
Serie A: Lazio beat Inter Milan to boost hope for first title in 20 years; Juventus score routine win over Brescia
Lazio's hopes of winning a first Serie A trophy in 20 years are very much alive after they came from behind to beat title rival Inter Milan 2-1 on Sunday.
Serie A: Zlatan Ibrahimovic scores in first start to set up victory for AC Milan; Inter held by Atalanta
Zlatan Ibrahimović is back. The 38-year-old scored in his first start back at AC Milan to end the Rossoneri’s goalless run and help them to a 2-0 win at Cagliari in Serie A on Saturday.
Lazio were fined 20,000 euros and at least temporarily avoided a stadium closure on Wednesday after their fans targeted Brescia striker Mario Balotelli with racist chants.
When the monkey chants are for you: Inter Milan forward Romelu Lukaku speaks out on racist abuse in Italy
There have been so many incidents, so many low moments, that it has been hard to keep up. Lukaku has found himself talking, and thinking, about the issue far more frequently than he would have hoped.
Serie A chief executive Luigi De Siervo apologises for using ape artwork as part of league's anti-racism campaign
Serie A chief executive Luigi De Siervo expressed his sincere apologies on Tuesday after the league installed a painting featuring monkeys at its headquarters for an anti-racism campaign.
Serie A's anti-racism campaign featuring apes draws widespread criticism; European anti-prejudice watchdog calls it 'sick joke'
Italy’s top-flight Serie A league launched a new anti-racism campaign on Monday by presenting artwork featuring three side-by-side paintings of apes but the move has been described by campaign group Fare as a sick joke.
At Napoli, Gennaro Gattuso replaces his former coach, as he spent eight of his 13 years as a player for AC Milan under Carlo Ancelotti.
Euro 2020 Qualifiers: Roberto Mancini spoilt for choice as record-breaking Italy head to European Championships
Italy coach Roberto Mancini’s biggest headache at the moment is who he will leave out of the 23-man squad that will head for Euro 2020 in June.