PSG will come up against an 'unstoppable ' player when Lionel Messi visits the Parc des Princes for Wednesday 's Champions League quarter-final , according to manager Laurent Blanc . Barcelona travel to Paris for the first leg and Blanc , who never won the competition as a player , is well aware of the threat posed by the magical Argentine . Messi has been in sensational form since the turn of the year and he now has 45 goals in 44 games - a total he will be hopeful of adding to against the Ligue 1 champions . Barcelona forward Lionel Messi celebrates after scoring against Sevilla in La Liga on Saturday . Messi bends home his side 's opening goal at the Estadio Ramon Sanchez Pizjuan during Barca 's 2-2 draw . Messi will lead the line for Barcelona when they take on PSG at the Parc des Princes on Wednesday evening . Speaking ahead of Wednesday 's game , Blanc said : 'Lionel Messi is unstoppable . If he scores 40 goals , he 's had a bad season ! 'But we ca n't just focus on him . The solution must be collective , man marking does n't work . ' The hosts must also be wary of Messi 's strike partners Luis Suarez and Neymar during the first leg , particularly with the away goals rule in place . Blanc added : 'We will need to be aggressive defensively but in the good sense of the term , to be able to stop their attackers . ' The second leg will be held at the Nou Camp on April 21 . PSG manager Laurent Blanc has described Messi as 'unstoppable ' as his side prepare to face Barcelona . PSG 's players train on Tuesday ahead of their Champions League quarter-final first leg with Barcelona . Blanc ( top left ) watches on as his players get put through their paces before Wednesday night 's game .
they face Barcelona in the euro League quarter - finals on Wednesday . Laurent Blanc says his side must not just rely on Lionel Messi . He wants PSG to be ' agressive defensively ' to keep out ben Enrique 's side . The second leg takes place at the euro Camp on April 21 . READ : Messi will line up with Cristiano Ronaldo in their dream team .