Ivan Rakitic, who made the move to the Nou Camp from Sevilla in 2014, has signed up for his old club again.
Lionel Messi, who turns 32 in June, Sergio Busquets, who will be 31 in July, and Gerard Pique, already 32, have hung on, driving the club through fresh cycles of success.
Barcelona went on to beat Tottenham 4-2 in an away match.
Tottenham Hotspur have lost both of their group matches after a 1-2 defeat at Inter Milan in their Champions League opener.
World Cup 2018 Semi-Final, Croatia vs England: Croatia thump England in extra-time to reach their first-ever final.
Former coach Slaven Bilic is confident this Croatian team can go one better than he and his team-mates in 1998 and reach the World Cup final.
FIFA World Cup 2018, Croatia Beat Denmark On Penalties At The Nizhny Novgorod Stadium.
Croatia won all three of their Group D games while Denmark, despite some underwhelming performances, are still unbeaten after emerging from Group C.
Second-half goals from Ante Rebic, Luka Modric and Ivan Rakitic sealed a deserved victory.
Croatia's 2018 World Cup squad is led by international stars Luka Modric, Ivan Rakitic and Mario Mandzukic.
Holders Barcelona secured a place in the Copa del Rey final for the fifth season running, becoming the first side to achieve such a feat.
The Barcelona-Real Madrid face-off is one that will add to the European football folklore.
Ivan Rakitic headed Barcelona into the lead just before half-time, but Angel Correa slotted home on the hour mark just seconds after Lionel Messi limped off to hand Atletico Madrid a deserved point in La Liga
Ivan Rakitic' was the lone scorer in Barcelona's La Liga opening 1-0 win against Athletic Bilbao
Late equaliser from Tomas Necid helped Czech Republic draw 2-2 with Croatia in Group D clash on Friday
Czech Republic had lost their opening European Championship finals game 1-0 to Spain in Toulouse last Sunday
Croatia dominated throughout the Euro 2016 encounter in Paris against Turkey, twice hitting the bar in the second half. But it was Luka Modric's 41st-minute strike -- his 11th international goal -- that separated the teams at the final whistle
Luka Modric scored a thunderous volley to put Croatia in front shortly before half-time. Both Croatia and Turkey failed to find the back of the net in the second half of the Euro 2016 encounter in Paris. Catch highlights of CRO vs TUR here.