Marcelino reflected on the achievement of Athletic Bilbao, who will face Real Sociedad and Barcelona in consecutive finals next month.
Alex Berenguer's extra-time strike sent Athletic Bilbao, who are yet to play the 2020 Copa del Rey final, into this season's showpiece.
Atletico Madrid's LaLiga title bid suffered a setback when they lost to Levante, but Diego Simeone is not reaching for the panic button.
Levante dealt a blow to leaders Atletico Madrid's title hopes with a victory at fortress Wanda Metropolitano on Saturday.
Diego Simeone tidak berasakan Atletico Madrid gugup berada di tangga teratas LaLiga sehingga terikat 1-1 dengan Levante di Estadio Ciudad de Valencia awal pagi tadi.
Atletico Madrid boss Diego Simeone rejected the notion the LaLiga leaders' draw with Levante came about as a result of nerves.
Angel Correa missed a second-half sitter as Levante frustrated LaLiga leaders Atletico Madrid, who are six points clear at the top.
Diego Simeone will be able to call upon Joao Felix once again on Wednesday, though he is yet to decide if he will start.
Athletic Bilbao boss Marcelino wants more from his 'anxious' players after a 1-1 draw with Levante in the Copa del Rey semi-final first leg.
Inigo Martinez cancelled out Gonzalo Melero's goal as Athletic Bilbao drew at home to Levante in their Copa del Rey semi-final first leg.