Cornella sit seventh of their Segunda B division, Spain’s third tier, however deserved a historic win due to a volleyed end by Adrian Jimenez within the seventh minute.
Atleti’s job grew to become more durable when 20-year-old Ricard Sanchez was despatched off within the 63rd minute, whereas Saul Niguez had hit the crossbar within the first half.
Diego Simeone additionally unnoticed some key gamers together with Luis Suarez, Koke, Marcos Llorente and Yannick Carrasco, with Joao Felix taken off within the second half once they wanted an equaliser.
However Atletico additionally struggled for fluency and probabilities towards a far much less prestigious opponent. “We apologise to the followers,” mentioned Saul. “We’re those accountable.”
Cornella had misplaced to Barcelona’s second group of their earlier match in December and in a uncommon look within the Copa del Rey’s final 32 in 2015 they took a 9-1 drubbing on mixture by Actual Madrid.
Atletico’s defeat makes it consecutive seasons they’ve misplaced to a third-tier facet within the cup after being knocked out by Cultural Leonesa 12 months in the past.
“The cup is just not giving us a lot satisfaction,” mentioned Simeone.
It additionally comes as a jolt forward of two powerful video games in La Liga towards Athletic Bilbao this weekend after which Sevilla, even when one much less competitors might support their title problem within the coming months.
Atletico, who sit two factors forward of Actual Madrid with two video games in hand, may very well be with out Felix towards Bilbao after Simeone confirmed he took a knock to his ankle.
Defender Jose Gimenez additionally went off injured early on and now appears to be like unlikely to function on Saturday.
Jimenez gave Cornella the lead with a hooked end, connecting brilliantly with Agus Medina’s cross on the close to publish to place his group in entrance.
Saul struck the crossbar after a weaving run and shot from Angel Correa triggered the ball to come out to the midfielder within the penalty field.
But Cornella have been by no means significantly troubled and performed the final half an hour with an additional man after Atletico’s Sanchez picked up a second yellow card for leaving a foot in on Cornella’s goalkeeper Ramon Juan.
Actual Betis had earlier crushed UD Mutilvera 3-1 to succeed in the following spherical whereas Levante, Elche and Granada additionally made it safely by means of.