A non-eventful first period brought just the one goal with Diego Costa turning home from close range to leave the capital outfit ahead at the interval.
Costa had his second in the early stages of the second period when he converted a Koke free-kick from close range, although the match ended in disappointment for the Brazilian as he was forced off with an ankle injury.
Read how it all unfolded in Sports Mole's minute-by-minute live commentary of the action below.
OSASUNA: Fernandez; Damia, Flano, Lolo, Bertran; Oier, Arrbias, Shojaei, Punal, De las Cuevas; Armenteros
ATLETICO: Courtois; Juanfran, Miranda, Diaz, Luis; Gabi, Suarez, Koke; Turan, Falcao, Costa