According to sources, an agreement was reached on Saturday between the two clubs worth 75 million dollars.
It wasn't long ago that Manchester United andArsenal were competing to get the strikers.
According to sources, Nunez wants to play in the regular season of the European club competition.
It is possible that the incoming deal will have an impact on the future of Sadio Mane, who has attracted interest from a number of clubs.
He was the top scorer in Portugal's top flight last season, with 34 goals in 41 appearances, and added some stellar performances in the group stage of the competition.
He scored 16 goals in 32 games for Almeria in the Spanish second division in 2019. The 20% of the profit will go to Almeria.
"Nunez is really good and has a big career ahead of him", said the manager of the team after the game against Benfica.