Aged 30, Pjanic's arrival has been criticised in some quarters as Barcelona's first-team is already viewed as ageing.
Italian champions Juventus signed creative midfielder Miralem Pjanic for 32 million euros ($36.14 million) from Serie A rivals Roma on a five-year contract, the Turin-based club said on Tuesday.
Juventus manager Massimiliano Allegri is confident Paul Pogba will stay put at the club despite talks about the French midfielder leaving for England or Spain.
Needing one point, Juventus got off to a dreadful start when they fell behind to a Nikola Milenkovic goal in the sixth minute, the Serb firing into the roof off the net from close range.
AS Roma striker Francesco Totti scored a stunning long-range goal just before the hour mark to sink Serie A leaders Juventus 1-0 in a nail-biting clash at the Olympic Stadium on Saturday.
Big-spending Real Madrid failed to qualify for the Champions League quarter-finals for the sixth straight season when Olympique Lyon dumped the Spaniards out 2-1 on aggregate on Wednesday.
Barcelona right back Dani Alves has completed his move to Italian champions Juventus on a two-year contract, the Turin-based club said on Monday. The 33-year-old Brazilian had earlier announced he would leave Barca as a free agent after eight successful seasons, during which he won 23 titles.
Cristiano Ronaldo's Champions League debut for Juventus lasted only 29 minutes as he was red-carded but the Italians began their Group H campaign impressively with a 2-0 victory at Valencia on Wednesday. Penalties either side of halftime by Miralem Pjanic sealed the points for the visitors as Valencia's return to European competition after a two-year absence fell flat.
Francesco Totti came off the bench to make his 600th league appearance for AS Roma as they beat in-form Chievo 3-0 at home on Sunday to climb to second place in Serie A.
Paulo Dybala upstaged his fellow Argentine Lionel Messi by scoring two exquisitely taken goals to set Juventus on the way to an emphatic 3-0 win over an underwhelming Barcelona in the Champions League on Tuesday.
Andrea Pirlo and Miralem Pjanic provided the moments of magic to inspire leading Serie A duo Juventus and AS Roma to battling victories on Sunday with the gap between the sides remaining at three points.
Argentine Dybala has scored seven goals in four games for Juventus this season, including a hat-trick against Genoa in Serie A on August 26.
Juventus are on 77 points, seven ahead of Atalanta, who thumped Brescia 6-2 on Tuesday, with five matches remaining.
Goals from Paulo Dybala and Juan Cuadrado sent Juventus back to the top of the Serie A table with a comfortable 2-0 win over 10-man Brescia on Sunday.
Talismanic goalkeeper Gianluigi Buffon bid a tearful farewell to Juventus after 17 seasons at the club when he played his last match for them in a 2-1 win over relegated Verona on Saturday.
Napoli squandered a two-goal halftime lead, then scored two late goals to beat nine-man AC Milan 4-2 in a stormy Serie A match which saw eight other players booked on Saturday.
Juventus have completed the signing of Argentina forward Gonzalo Higuain from Napoli.
Juventus came from behind to snatch a dramatic 3-2 win at Chievo as Cristiano Ronaldo made his debut for the Turin side on Saturday, although the Portuguese was not among the scorers in his first Serie A match.
IMAGES from the Serie A match played between Juventus and Sampdoria on Sunday.
Juventus coach Massimiliano Allegri believes Cristiano Ronaldo deserves to win the Ballon D'Or, following media reports that the forward has not been short-listed for the award's final three for the first time since 2010.
Champions Juventus lost for the third time in six Serie A matches this season after goals from Lorenzo Insigne and Gonzalo Higuain secured a 2-1 home win for Napoli on Saturday.
Inter Milan's Mauro Icardi scored with two minutes remaining to hand them a 2-1 win over AS Roma.
Stefano Sturaro, who joined Genoa on loan from Juventus in January before the deal was made permanent, put the home side in front in the second half before fellow substitute Goran Pandev secured the shock result with 10 minutes remaining.
Dani Alves appeared to have won the game for Juventus when he headed them in front in the 83rd minute but Remo Freuler pounced to equalise six minutes later as he punished some sloppy defending.
The 20-year-old was jeered at the Melbourne Cricket Ground when he tripped over the ball on one of his first touches in the area, but a minute later soaked up the acclaim after slotting home a through ball from Nigerian teenager Kelechi Iheanacho.
Cristiano Ronaldo's goal, which took his league tally for the season to 21, meant that he joined Fabio Quagliarella and Gabriel Batistuta as the only players to have scored in 11 consecutive league appearances. He also reached yet another milestone with his 1,000th match for club and country in a remarkable career which has seen him play for Sporting, Manchester United, Real Madrid and Portugal.
AS Roma became the first team to win their opening 10 Serie A games of the season when they overcame bottom side Chievo 1-0 thanks to Marco Boriello's late header on Thursday.
South Korea were left with plenty to ponder ahead of this month's World Cup finals after Edin Visca scored a hat-trick to give Bosnia and Herzegovina a 3-1 victory in a friendly in Jeonju on Friday.
Juventus supporters coach Massimiliano Allegri has often been in his element when he is apparently on the back foot.
Miralem Pjanic's free kick gave Juventus a 2-1 win at Chievo on Sunday as goalkeeper Gianluigi Buffon celebrated his 600th Serie A appearance.
Juventus slumped to another surprise defeat on Wednesday when the champions lost 1-0 at Sassuolo while AS Roma reclaimed top spot in Serie A with a 3-1 home victory over Udinese.
AS Roma slipped up in their pursuit of Serie A leaders Juventus as they salvaged a 1-1 draw at mid-table Palermo on Saturday thanks to a second-half Mattia Destro equaliser.
Champions Liverpool suffered a shock 1-0 defeat to lowly Burnley on Thursday, ending their 68 match unbeaten home record in the Premier League as their title defence continued to fade.
Gonzalo Higuain aims to repay Juventus for splashing out 90 million euros ($99.74 million) to sign him from Napoli and make the Argentina striker the third most expensive player in world football.
Lionel Messi requires two more goals to reach 500 for Barcelona and will have his sights set on achieving the milestone against great rivals Real Madrid in Sunday's Clasico.
AS Roma qualified for the Champions League group stage in the best possible style on Monday, booking their place with a last-gasp 2-1 win over neighbours and bitter rivals Lazio in a passionate Rome derby.
Balotelli made his debut for his hometown club after completing a four-match suspension that he was handed at Olympique de Marseille last season, while the visitors were without Cristiano Ronaldo as he recovers from injury.
News of all that's transpired on and off the football field.
Genoa blew away Serie A leaders Juventus on Sunday, scoring three times in an astonishing first half hour on the way to a pulsating 3-1 win.
AS Roma were dumped out of the Italian Cup on penalties by second-tier Spezia after a 0-0 draw at home extended their winless streak to seven matches and heaped pressure on coach Rudi Garcia.