Premier League champions Leicester City have appointed interim boss Craig Shakespeare as permanent manager until the end of the season.
"If we think that a one-goal advantage will qualify us, it's a mistake", the Argentine manager said.
Under Shakespeare Leicester have won their two games since defeat at the Ramon Sanchez Pizjuan Stadium and Riyad Mahrez said the Foxes' chances of continuing their European campaign are good.
Danny Drinkwater says the Leicester City players would love to see Craig Shakespeare given the manager's job beyond the end of the season.
Sevilla looked magnificent in the first leg of this match-up with the 2-1 score line not serving justice to how good Sevilla performed.
He has spent seven of the last eight seasons on the Leicester coaching staff.
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The squad have recently returned from a four-day bonding exercise in Dubai to continue the momentum they have built up in the last few weeks - following some important league wins over Liverpool and Hull City.
"The team (Leicester) is now back to being as unsafe as they were past year".
Shakespeare was assistant to Pearson, having returned to the club following their spell at Hull in 2011, when the Foxes pulled off their Great Escape two years ago. We have practiced penalties and we try to leave no stone unturned. "We were all very happy to see him get it short term, I'm sure it would be the same reaction longer term".
The Spanish outfit, which travels to the King Power stadium holding a 2-1 advantage from the opening leg on February 28, has drawn its last two games, including 1-1 on Saturday at relegation-threatened Leganes to drop to third in La Liga.
Leicester will be without Nampalys Mendy due to a knee injury.
"Playing like this, we're going to struggle to go far in the Champions League, because you face the toughest games against opponents who don't afford you any mistakes", Sampaoli said.