The Juventus coach, Massimiliano Allegri, said the winger Douglas Costa will be fined by the club after he was sent off for spitting at a Sassuolo opponent on Sunday, marring a 2-1 Serie A win in which Cristiano Ronaldo scored his first goals for the club.

Costa, who faces a lengthy ban, was dismissed for spitting at Federico Di Francesco after a running feud in which the Brazilian also elbowed and head-butted the Sassuolo player.

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“Even if he was fouled, these episodes must not happen,” Allegri said. “We mustn’t fall for provocation. The game was winding down, we had it in the bag and, instead, we stopped playing as a team, everyone wanted to dribble a bit. Then the other team gets back into the game, some players get irritated and that sort of thing happens.” Allegri added: “It’s only right that [Costa] is fined and he certainly will be. I was surprised by his reaction. We have suffered a goal, a red card and a suspension which will be long.”

Ronaldo needed three-and-a-half games to break his duck for Juventus but Allegri said he never had any doubts about the Portugal forward.

“Was there any anxiety? Not on my part,” said Allegri. “You just have to see the first three games and how close Ronaldo went to scoring,” he said. “He was a little too hasty and eager to score again today, but football takes away and it gives, and the ball bounced off the post and right into his path.”

Juventus, chasing an eighth successive Serie A title, have 12 points, three ahead of Napoli while Sassuolo are on eight after their first defeat of the season.

“I was a little bit anxious as expectations were high,” said Ronaldo. “I really wanted to score, so I’m happy.”

Ronaldo could easily have had a hat-trick but missed two more good chances and also had a penalty appeal turned down. He volleyed wide from six yards out and also missed when the rebound landed at his feet as João Cancelo’s shot was saved by Andrea Consigli.

Eleven Sports (@ElevenSports_UK) He's off the mark! @Cristiano won't care that it's probably the easiest goal of his career. He is up and running and his three-and-a-half game drought (!) is over. It's @juventusfcen 1 - @SassuoloUS 0. Up and running! Subscribe - https://t.co/YbI6T6O8MU #CR7 #Ronaldo #Juve pic.twitter.com/IXWfTcdRI2

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