Briefly teammates with Messi at Barcelona between 2005-06, Van Bommel didn't hold back in Monday's news conference.
"I don't think PSV are one of the softest opponents; I think they're a good team that attacks well, plays together and has players that can unbalance you", he said.
Coutinho, who has not featured regularly from the start for Barca, has now claimed that being compared to the 2010 FIFA World Cup victor is "tough".
"It would be a dream to come to this club, but right now I am focused on PSV and enjoying my football".
"It's a dream come true [to play at Camp Nou]", he added. I had a number of posters on my bedroom wall growing up, one of them was a Barcelona poster.
Barca eventually signed Malcom from Bordeaux, ending any potential interest in Lozano for now, but the Champions League draw has brought him to Camp Nou anyway.
Spanish La Liga champions Barcelona on Tuesday night, September 18, began their campaign in the 2018/19 Champions League will an emphatic 4-0 win over visiting PSV Eindhoven. It will be very hard for us, but I am incredibly excited about it. Barça has so many good players that it is very hard for us, but we always have a chance.
Barcelona host the Dutch league leaders and Van Bommel wants his players to stay professional as they face the player he described as the best in the world.
"I do not care who gets Leo's shirt after the game".