"We knew that it would be a very tough game, but I think in both games we were playing too defensive", the Poland global told Viasport.
Liverpool have won their last four European ties after playing the first leg at home, the victory over Bayern following Champions League wins against Manchester City and AS Roma last season and Europa League success over Manchester United in 2016.
Barça players agree unanimously about the teams they hope to avoid in the next round - Manchester City and Juventus.
After Liverpool stylishly progressed to the Champions League quarter-finals by beating Bayern Munich 3-1, we picked out 10 top stats to emerge from the victory at the Allianz Arena. The Bavarians, who had reached the Champions League quarter-finals or better in each of the last seven seasons, needed a second with Liverpool heading through on the away goals rule. Joel Matip was a centre-half struggling to earn Klopp's trust prior to Van Dijk's arrival, but he is now a supremely confident central defensive partner for the main man, and his own-goal against Bayern, when he could either divert the ball into his own net or leave it for Robert Lewandowski to score, should not take the shine off his performance.
Right now, he is the best defender in the world, with nobody anywhere questioning his value.
"We knew they would attack a little bit more and we would have more spaces to play and we used it as well". They needed more of those goals on Wednesday, but never got them.
His quality shined even more in contrast to Bayern's defensive pairing of Mats Hummels and Niklas Sule. He is so young, already so mature, really strong, all good.
"Well, hopefully", replied Van Dijk.
"We didn't risk so much", said Lewandowski, Bayern's main scoring threat. "We are in the fight for first position in the league, but we want to play in the Champions League as well, which is the tournament we want to go far in, we want to give everything in this competition as well".