 The "Che" were eventually crowned national champions, adding that season's UEFA Cup.However, after only one season, Oliveira joined Real Betis for a reported fee of €4 million.He scored a career-best 22 league goals in 37 appearances as the club reached the UEFA Champions League for the first time ever after finishing fourth, and also won the season's Copa del Rey against CA Osasuna, with the player netting the first in a 2–1 extra time win.