'Hello Coutinho, it's Ronaldinho speaking here to wish you all the luck in the world, ' said Ronaldinho.
Philippe Coutinho also made his debut for his new club, coming on for Andres Iniesta in the 68th minute, while Messi's 25th-minute strike was Barca's 4000th goal at their illustrious stadium.
Barcelona will enter the contest high on confidence after thumping Real Betis 5-0 in La Liga at the weekend.
Arda Turan and Mascherano left for Istanbul Basakeshir and Hebei China Fortune.
A moment to savor, I suppose, for Barcelona fans, who haven't seen many big-name Brazilians come through their ranks.
Meanwhile, Coutinho, who donned the No.10 shirt at Liverpool, was asked whether he would have the same number at Barcelona which is now occupied by Lionel Messi.
Substitutes: 1. Ter Stegen 14.
The hosts swiftly tightened their usual grip on possession and were making moves to find the dynamic duo of Messi and Suarez up top, with the latter firing in the opener after only nine minutes on Thursday.
Although there were no goals from Coutinho in the match, this is only the beginning. Barcelona almost added to its lead when Rakitic launched a ball onto the head of Messi, but seeing as it wasn't his left foot, Messi put the shot off the post.
Argentine worldwide Javier Mascherano was honored by Barcelona before the match.
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