This was due to the recent terrorist attack in Barcelona, with the Catalan outfit wearing shirts with Barcelona written on the back instead of their names.
The brutal terrorist attack on Barcelona's most famous street, La Rambla, left 17 people dead and many more injured on Thursday afternoon as a van ploughed into unsuspecting tourists in the city centre.
"We love Barcelona and we don't want to miss this game", father Gerard said, adding that he bought the tickets as an anniversary present for his wife.
It's safe to say Barcelona's new signing Paulinho hasn't exactly been welcomed with open arms to the club by its supporters.
Barcelona had a decent chance to make the breakthrough inside three minutes when Roberto drove into the Betis box before feeding Deulofeu in a unsafe area, but the Spaniard poked the ball wide of the post. But all of us have to help him.
Espanyol, also based in Barcelona, published photographs of their squad linking arms in a circle to pay their respects.
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Aside from the shirts, Barcelona is planning a minute's silence before the match on Sunday.
Fourteen people died in two separate attacks in Catalonia. Spain's King Felipe and Queen Letizia were among those who prayed for the 14 people killed in Barcelona and Cambrils.
Pochettino said: "I would like to send my solidarity and my support for the victims of the tragic event in Barcelona, my city". I've scored today and I want to be important.
Barcelona looked to have made the breakthrough in the 35th minute when Messi curled a sensational free kick towards the bottom corner, but the ball rebounded off the post as Betis survived another risky moment. Your best bet is to check who is showing the game in your country, and if they have an online service or iOS/Android app to watch it on.
"It's not just this one (incident) because there have been other ones, so we have to condemn that and regret all these things that are happening now".
The club also posted videos of a minute's silence held by players and coaching staff at the team's Camp Tito Vilanova training ground with similar memorials being held at academy grounds Ciutat Esportiva Joan Gamper and The Masia. The Barca players wore black armbands.