Barcelona started life without Lionel Messi by defeating Real Sociedad 4-2 in their La Liga opener at the Camp Nou on Sunday even if fans admitted it felt like "a leap into the unknown".
Captain Gerard Pique gave them a 19th minute lead with his 50th goal for the club.
Just over 20,000 fans were in attendance as crowds returned for the first time since the pandemic. However, they had to hold their breath at one stage when Sociedad came back from 3-0 down to get to 3-2 thanks to goals from 20-year-old Julen Lobete in the 82nd minute and a 30-metre free-kick from skipper Mikel Oyarzabal three minutes later.
Six-time Ballon d'Or winner Messi called time on his two-decade career at Barcelona last week and moved to Paris Saint-Germain.
Messi's memory lingered heavy over the Camp Nou on Sunday despite the removal of a giant photograph of the Argentine superstar from the entrance in the wake of his move to France.
Some banners were in place well before kick-off venting the fans anger towards president Joan Laporta. Inside the Camp Nou, fans made the most of their return after 18 months, chanting "Messi! Messi!".
Banners expressed their "eternal gratitude".
"We knew they were going to react that way. We all know what Leo represents, but everything changes and we have to keep going.
La Liga champions Atletico Madrid got their season underway with a 2-1 win at Celta Vigo.
Angel Correa gave Atletico the lead after 23 minutes after being set up by Thomas Lemar.
Correa added a second goal in the 64th minute just five minutes after Iago Aspas had pulled Celta level from the penalty spot.