Athletic Bilbao coach Ernesto Valverde says they must not get carried away with this week's Champions League success.
The Basques produced an emphatic comeback against Napoli in mid-week, beating the Serie A side 3-1 to qualify for the Champions League proper for the first time in 16 years, but have got off to a bad start in the Primera Division, losing their opening game at Malaga.
"We need to put the euphoria of the Napoli game to one side because we've got zero points and we need to start picking them up," Valverde told a press conference.
"The fact we lost last week obliges us to beat Levante, especially because our next game after that is at the Nou Camp."
