Udinese could not make it back-to-back wins following last Wednesday’s impressive 4-0 home win against Bologna.
Kevin Lasagna put Udinese 1-0 ahead in the 32nd minute before Piotr Zielinski equalised for Napoli on 69 minutes.
The draw leaves Udinese on 14th position on 15 points in the Serie A table.
Troost-Ekong has now made 13 league appearances so far for Udinese this season.
In Spain, Eagles midfielder Ramon Azeez was benched for the second consecutive game for Granada who beat nine-man Deportivo Alaves 3-0 in the Spanish LaLiga Santander.
It was the second straight game that Azeez has been an unused substitute for Granada who prior to Saturday’s clash, had not won their last five league games.
Carlos Fernandez (48th minute), Roberto Soldado (58th minute penalty) and Yangel Herrera (77th minute) were the scorers for Granada.
Black Stars of Ghana’s Mubarak Wakaso and Victor Laguardia were sent off for Deportivo Alaves.
The victory lift Granada to ninth spot on 24 points in the league standing.
Azeez has made 12 league appearances for his side this campaign and has scored two goals.
And in the French Ligue 1, Henry Onyekuru was not in AS Monaco’s squad that thrashed visitors Amiens 3-0.
The former Everton player has featured four times for Monaco but his yet to find the back of the net.
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