Osasuna welcomed Espanyol to the Estadio El Sadar on Sunday looking to ease their relegation troubles with nine matches remaining.
Neither side could open the scoring in a low-key first period, with clear chances remaining few and far between.
Espanyol took the lead in the early stages of the second half, however, when Hector Moreno thumped a header into the back of the net from close range.
Osasuna pushed for the equaliser in the latter stages, but they were stung on the counter when Mubarak Wakaso made it 2-0 late on.
Read how it all unfolded in Sports Mole's minute-by-minute live commentary of the action below.
OSASUNA: Fernandez; Ruben, Lolo, Bertran, Oier; Arribas, Silva, De las Cuevas; Armenteros, Nino, Sola
ESPANYOL: Casilla; Colotto, Moreno, Forlin, Alvarez; Simao, Verdu, Baena, Lopez; Garcia, Stuani