The agent of Porto's Juan Quintero has played down reports linking the Colombia star with an imminent move to Arsenal.
Atletico Madrid president Enrique Cerezo will not try to sign Fernando Torres, Javier Hernandez or Santi Cazorla.
The 28-year-old has joined the club from Internacional for an undisclosed fee and has signed a two and a half year deal.
He becomes Gus Poyet's fourth acquisition this month following Spanish full-back Marcos Alonso's arrival on loan and the captures of Scocco's compatriots Oscar Ustari and Santiago Vergini.
Scocco was in the stands at the Stadium of Light as the Black Cats beat Stoke 1-0 to climb out of the Barclays Premier League relegation zone.