Ronald Koeman paid tribute to Kylian Mbappe while admitting Barcelona must accept Paris Saint-Germain have a "more complete team" following their Champions League rout at Camp Nou.

PSG - last season's runners-up - took a commanding lead in the last-16 tie thanks to hat-trick hero Mbappe, who fuelled a stunning 4-1 demolition on Tuesday.

Lionel Messi, whose has been heavily linked with PSG, opened the scoring via a penalty before the French visitors seized control courtesy of Mbappe and Moise Kean.

Ligue 1 champions PSG outclassed and overpowered Barca to put one foot in the Champions League quarter-finals ahead of the return leg on March 10.

Barca head coach Koeman acknowledged PSG's superiority was clear to see and conceded the embattled LaLiga giants have some way to go in order to compete with Mauricio Pochettino's men.

"They were superior, they were very efficient, in particular thanks to to Mbappe," Koeman said.

"The first half was balanced. At 1-0, Ousmane [Dembele] had a good opportunity. In the second part of the match, we had some defence problems.

"They showed that they were superior, with the ball and especially physically.

"They had a more complete team than ours. We have to accept it and keep improving. We know that can happen. This team is ahead of us."