Barcelona look set to have Andres Iniesta available for Saturday's Champions League final against Juventus with the midfielder having returned to training after a calf injury.

Iniesta, 31, missed his side's workouts earlier this week after being injured during last weekend's Copa del Rey final triumph over Athletic Bilbao, but rejoined the squad in training on Thursday.

That means Iniesta could yet line up alongside his long-time midfield colleague Xaxi for the final time in Saturday's final, which will be the last match in Barca colours for latter.

Club captain Xavi is leaving Barca after 24 years this summer to join Qatari side Al Sadd, and the 35-year-old playmaker is hoping to go out a winner.

"We go into the final full of confidence and charged up," Xavi said to the Spanish press.

Should Barcelona emerge victorious from the Olympiastadion, Xavi will leave with 25 trophies in his famous career with the Catalan club.

Two of those titles have come this season, with the Blaugrana having already clinched the league title and a record 27th Copa del Rey in Luis Enrique's first year in charge.

Barca are the only Spanish club to have won a Primera Division, Champions League and Copa del Rey treble, something they did under Pep Guardiola in the 2008-09 campaign.

Victory on Saturday would see Barca repeat that feat.

"We already have a historic double and we want more," Xavi said. "We could equal the historic treble."

Defeating Italian champions Juventus will be no easy task, though.

Juve have already eliminated Barcelona's arch-rivals and reigning European champions Real Madrid in the semi-finals, and are also on for a trophy treble this season.

"Juventus are a great team, with talent and physique," Xavi said. "Saturday's final will be my last for Barca and I hope to lift the trophy in Berlin."

Barca will again be looking to star man Lionel Messi to try and break down the Juventus defence and possibly add to his remarkable total of 55 goals in all competitions this term.

Xavi has been alongside Messi for most of Barca's triumphs in the last decade and the former Spain ace does not believe there has been anyone better to have played the game.

"What Messi does is scandalous," Xavi said. "He is the best in the world and of the history of the sport.

"What he does is unique.

"The goal against Athletic in last weekend's final was one of his best. "

Luis Enrique will take a full squad to Berlin, with reserve players Munir, Sandro and Samper also travelling to the German capital.

Barca, meanwhile, announced on Thursday that winger Pedro had agreed a three-year contract extension.

The Spain international's new deal ties him to the Nou Camp until June 30, 2019 and his buy-out clause of 150million euros will remain the same.

The Tenerife-born forward, 27, has scored 11 goals in 48 appearances for Barca in all competitions this season.

Barca, who also this week agreed to extend the contract of Spain defender Jordi Alba, cannot make any acquisitions until January 2016 due to a transfer ban imposed by FIFA for breaching rules on signing international players under the age of 18.