Athletic Bilbao coach Ernesto Valverde says there'll be no underestimating Copa del Rey opponents UE Rubi.
Athletic travel to Catalunya and the city of Rubi where they will face the Liga Elite outfit.
"We've always approached these matches with a competitive attitude and we've managed to advance through the rounds," Valverde said in his pre-match press conference.
"We'll approach this match as if it were our last. It's true there's a difference in divisions, but you must always respect your opponents. If we want to remain in the draw, we can't fool around.
"We're starting a new competition. It's a classic in the Copa. There are matches in which everyone thinks you're going to win and in which you have the disadvantage of playing at unfamiliar ground and against a team with extra motivation.
"They have a lot to win and little to lose. You have to be very prepared. They're going to play in front of their fans with all the motivation in the world and if we don't approach the game properly, that's when we could start to have doubts.
"We have to keep in mind that it's 90 minutes and that anything can happen at any moment. They've earned their place in this round of the competition, they deserve all the respect in the world and the best way to respect them is to go there and show them who we are."