MADRID, Oct 20 (Reuters) - Primera Liga sides Real Mallorca, Malaga, Racing Santander and Real Sociedad were eliminated by lower-league opponents in the third round of the King's Cup on Thursday.
Mallorca, the 2003 Cup winners, were humbled 4-1 by Alcoyano while Racing lost 1-0 to another third division side, Burgos.
Malaga could only draw 1-1 after extra-time against third division Baza and were beaten in a penalty shootout, as were Real Sociedad after a 1-1 draw with third division Zamora.
Primera Liga Alaves also lost 1-0 to second division strugglers Eibar on Wednesday.
Athletic Bilbao, Cup winners 23 times, defeated Real Union 1-0 while Celta Vigo eased past fourth division Tenisca 3-1 thanks to a hat-trick from forward Jesus Perera.
Former Chelsea striker Mateja Kezman scored a late goal to put Atletico Madrid through 1-0 at the expense of Las Palmas while Getafe won 2-1 in the Madrid derby against Rayo Vallecano.
Cadiz needed extra-time to put out second division Albacete 3-1 while Real Zaragoza went to extra-time and penalties to see off third division Alicante after drawing 1-1.
Another successful third division side were Hospitalet, who came from 2-0 down against second division Gimnastic to win 4-3.
Second division Xerez and Lleida also progressed.
The nine Primera Liga teams who have played in Europe this season will not enter the competition until the last 16 due to be played in January.
Defender Jose Rodriguez Parado put Alcoyano ahead against Mallorca after 16 minutes and striker Sergi Mesa converted a penalty on the stroke of halftime.
Midfielder Aitor Antonana struck twice in the second half, either side of a 69th-minute effort from Mallorca's Japanese forward Yoshito Okubo.
The defeat puts further pressure on coach Hector Cuper, whose side are bottom of the Primera Liga with one win from seven games.
A 79th-minute goal from defender Raul Aguilar helped Burgos edge toothless Racing who have only scored three league goals this season.