Dusan Vlahovic struck twice as Fiorentina ended AC Milan's unbeaten Serie A record on Saturday with a thrilling 4-3 win in Florence.
The victory lifted Juventus, who had lost their last two league games, to eighth, behind Fiorentina on goal difference and 13 points behind top two Napoli and AC Milan who both play on Sunday.
Milan were under pressure after Napoli had opened up a three-point gap at the top of the table after claiming the spoils in a 1-0 derby victory over Salernitana.
The Gunners are languishing in 13th place with 10 points despite the run. Arsenal are immediately above Palace who have 10 points.
In an open letter to supporters posted on the club's website, billionaire businessman Commisso said the 21-year-old striker, whose contract with the Viola expires in June 2023, had refused an offer that "would have made him the highest-paid player in the history of the club".
Luciano Spalletti's Napoli have a perfect 21 points from their first seven league matches thanks to their come-from-behind victory at the Stadio Artemio Franchi in Florence, which came thanks to strikes from Hirving Lozano and Amir Rrahmani either side of half-time.
European football matchday: Unbeaten Liverpool face tough test against Man City; Fiorentina host Napoli
Liverpool's unbeaten start to the Premier League will be put to the test with the visit of defending champion Manchester City to Anfield
Atlético Madrid try to end a two-game winless streak when they visit struggling Getafe in LaLiga.
They are a point ahead of Roma, AC Milan, Napoli and Fiorentina following a thumping win which came thanks to goals from Lautaro Martinez, Milan Skriniar, Nicolo Barella, and Matias Vecino and a brace from Edin Dzeko.
After netting the winner he snatched a camera from a pitch-side photographer to take a snap of the celebrating fans behind the goal.
Juve missed a cutting edge in front of goal in what was the worst possible start to life without the 36-year-old, who last term topped the Serie A goals charts and scored over 100 times for the in three seasons in Italy.
Serie A: Ronaldo starts on bench as Juventus waste two-goal lead; Abraham shines in Mourinho's Roma bow
Ronaldo started on the bench at the Dacia Arena in Udine amid rumours he is looking for a way out of the Italian giants, but he almost snatched the three points deep into stoppage time after Juve insisted he was going nowhere this term.
Chelsea visit Arsenal in a London derby and could hand a debut to Romelu Lukaku.
The 23-year-old, currently playing in the Copa America with Argentina for whom he has eight caps and two goals, has signed a five-year deal until June 2026.
Gattuso was appointed as Fiorentina boss on 25 May less than 48 hours after announcing his departure from Napoli and had not been expected to start work until 1 July.
Stefano Pioli's side could have sealed a return to elite European football for the first time since the 2013-2014 season with a win over the Sardinians.
Napoli's final game will be at home against midtable Hellas Verona, as they look to return to elite European football after missing out last season.
Serie A: Matteo Darmian pushes Inter Milan to brink of A title with 'nine point' win, Atalanta move second
Inter are 11 points ahead of Atalanta, who moved second with a 5-0 rout of 10-man Bologna, with five games remaining.
Serie A: Matteo Darmian's strike helps leaders Inter Milan beat Cagliari; Juventus clinch win against Genoa
Moroccan Achraf Hakimi came off the bench and set up Darmian to grab the winner with 13 minutes to go at the San Siro.
“With great sadness the club has accepted Cesare Prandelli's decision, acknowledging that the reasons behind this go beyond football,” Fiorentina said in a statement.