Ernesto Valverde cautioned Barcelona against complacency after confessing to knowing little about Champions League last-16 opponents Lyon.
The La Liga leaders avoided an undesirable date with Liverpool in Monday's draw but were set the awkward challenge of a developing team that went unbeaten in Group F.
Lyon memorably toppled Manchester City at the Etihad Stadium in September and twice led the Premier League champions during an entertaining 2-2 draw in the reverse encounter.
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Valverde, who guided Barca comfortably through a group containing Tottenham and Inter, conceded his knowledge of the Ligue 1 outfit is limited, but the Spaniard knows enough to be wary.