Mallorca suffer more away misery at Tenerife
Tenerife forward Nino broke clear to grab the only goal after 14 minutes, cheering a crowd who responded well to the league's return to Monday night football after a break of more than a decade.
It was the promoted club's first victory in nine attempts and they climbed to 18th, one point from safety after 22 matches.
Mallorca boast a 100 percent home record but have struggled to replicate that form on their travels and failed to reclaim fourth place from Sevilla, staying two points adrift in fifth with 37.
Sevilla edged Osasuna 1-0 on Sunday to climb in to the Champions League qualification places.
Leaders Barcelona suffered their first league defeat of the season when they lost 2-1 at Atletico Madrid on Sunday to stay on 55 points, two ahead of Real Madrid who won 3-0 at Xerez on Saturday.