Malaga crashed out of the Copa del Rey on Tuesday night after a 1-1 draw against Numancia at La Rosaleda.
The Blue and Whites trailed the second division side from the first leg (1-2) but looked set to progress on away goals when Adrián hooked Jony's left-wing cross inside the far post beyond Munir's desperate reach after just 18 minutes.
Juanpi ought to have doubled his side's lead ten minutes later but his header from the penalty spot was too close to Munir who flicked the ball away with his leg.
The hosts, who rested Roberto, Adalberto Peñaranda, Paul Baysse, Keko Gontán, Recio, Chory Castro and Roberto Rosales, were given a scare just before the half-time whistle when Nacho Sánchez's half volley whistled past the far post.
Míchel's side should have heeded the warning, but were caught napping once again seven minutes into the second half. This time Unai Elgezabal made Malaga pay as he nodded home Dani Nieto's corner from the right.
This took all of the sting out of the hosts' play, and Míchel immediately turned to his bench and brought on attackers Diego Rolán and Youssef En-Nesyri to join Bastón and Juanpi in a very attacking 4-2-4 formation.
It almost paid dividends in the 72nd minute when Juanpi found himself in acres of space but could only hit his shot straight at Munir and Bastón's rebound was blocked.
However, despite the pressure, this was the closest Malaga would come with Bastón spurning two half chances in the dying minutes, only to be flagged offside afterwards.
This is now the third consecutive year that the Blue and Whites have crashed out of the cup at the last-32 stage, each time at the hands of lower-league opposition.