Rakitic sustained the injury during Barca's shock 3-0 defeat to Roma on Tuesday as the Catalans were knocked out of the Champions League quarter-finals on away goals. "It's a very big disappointment after the great season we have had".
Ivan Rakitic will undergo surgery after breaking a finger as Barcelona crashed out of the Champions League in dramatic fashion at Roma on Tuesday.
Barca's passage into the semifinals looked assured after they won the first leg 4-1 but they gave their worst performance this season at the Olympic Stadium and went out to goals by Edin Dzeko, a Daniele De Rossi penalty and a Kostas Manolas header. The Champions League suddenly has become a tough challenge for Barcelona. We're all hurt. It's not a question of asking for forgiveness, things go for you or they don't, but our desire to win is always the same.
The 2014/15 campaign was the last time Barcelona and Messi lifted the coveted title, but in their three knockouts in the previous years (2-1 loss against Atletico, 7-0 drubbing by Bayern Munich and 3-2 defeat to Chelsea), Messi was not to be found on the scoresheet.
It is their third consecutive exit from the competition in the last eight.
Per Sport's Victor Vallespir, the former said it was a "sad day" for the club and added: "The message is that we're sorry for all Barca fans around the world".
"At half-time, the coach [Eusebio Di Francesco] said to keep doing what we were doing and to stay calm - we knew we could create something magical here".
And Iniesta, who looks likely to depart to China at the end of the season admits it's been a bitter pill to swallow - considering it may be his last game in Europe's elite club competition.
"We never felt comfortable in the game because Roma played very well and we couldn't get our own game going", he said at his post-match press conference.
While Barca's Treble dream died in Rome, they can still win a Double this season - they're 11 points clear at the top of La Liga and through to the Copa del Rey final.