Speaking to Sky Italia at the Globe Soccer Awards in Dubai, Jorge Mendes said the deal would have been worth 100 million euros a year to the Portugal striker.
Argentina striker Carlos Tevez has immediately walked into a potential storm after arriving in Brazil.
Juventus missed a chance to extend their advantage over second-placed AS Roma when they played out a dismal 0-0 draw away to Udinese on Sunday, while Napoli closed in on Serie A's top two with a 2-1 win at Chievo.
Carlos Tevez scored from a free kick for the second game in a row in a 3-0 win in the Copa America football semi-final.
Juventus reached the halfway point of the Serie A season with a commanding five-point lead over Roma after thrashing Verona for the second time in four days on Sunday.
Carlos Tevez scored a solo goal after a run that started inside his own half to cap an emphatic 7-0 win for Serie A leaders Juventus over hapless Parma on Sunday.
Striker Jonathan Calleri chipped a brilliant 'rabona' as Boca Juniors marked Carlos Tevez's homecoming with a 2-1 victory over Quilmes at La Bombonera to stay top of the Argentine championship.
Juventus striker Carlos Tevez scored a magnificent first-half goal, and later missed a penalty, as the runaway Serie A leaders won 1-0 at home to mid-table Genoa on Sunday.
Carlos Tevez scored two early goals for Juventus before the Serie A leaders squandered the lead in a 2-2 draw at Verona on Sunday.
This and more from the happenings in the world of football
Nigeria midfielder John Obi Mikel has become the latest big name player to join the Chinese Super League gold rush after leaving Chelsea for Tianjin Teda.
Juventus's win over Real Madrid has strengthened their conviction that they are good enough to rejoin European football's elite after years of watching the Champions League final stages from the sidelines.
Carlos Tevez scored a stunning goal as Serie A leaders Juventus beat Torino 1-0 on Sunday to continue an extraordinary dominance of their neighbours.
Toure criticises players for accepting lure of China cash
Juventus striker Carlos Tevez struck to give the Serie A champions a 1-0 win over AC Milan on Saturday, handing coach Massimiliano Allegri a winning return to San Siro where he was shown the door eight months ago.
A virtuoso performance from Sergio Aguero earned Manchester City a 4-1 victory over Tottenham Hotspur in the Premier League on Saturday, the Argentine scoring all his side's goals in an incident-packed clash at The Etihad.
Substitute Alessandro Matri was the unlikely hero when he scored an extra-time winner to give Juventus a 2-1 win over Lazio in the Coppa Italia final on Wednesday, keeping them on course for the treble.
The Fernando Llorente and Carlos Tevez double act struck again on Sunday with both players scoring to give Juventus a 2-0 win at AC Milan which strengthened their grip on Serie A.
Carlos Tevez scored twice to give Serie A leaders Juventus a 3-2 win over Fiorentina on Wednesday but Lazio prevented them from celebrating the title by thumping bottom club Parma 4-0, which condemned their opponents to Serie B.
Juventus defeated second-placed Lazio 2-0 at home on Saturday to take another huge step towards their fourth straight Serie A title and boost their confidence for Wednesday's crunch Champions League clash in Monaco.
Napoli ended Juventus's hopes of securing a record seventh Italian Super Cup after snatching a dramatic 6-5 shootout win.
Chelsea, Bayern Munich, Real Madrid and Juventus consolidated their top-flight leads at the weekend while Paris St Germain proved too strong for Ligue 1 leaders Olympique Marseille.
Juventus landed a fourth successive Serie A crown, and their first under coach Massimiliano Allegri, with four games to spare by winning 1-0 at Sampdoria on Saturday.
Financial details of Oscar's transfer to Shanghai SIPG from English Premier League club Chelsea have not been released, but media reports have suggested Shanghai paid 60 million euros ($62.6 million) to lure the 25-year-old to the Chinese super league club.
'This team is really good and we have invested a lot in it. Now we have to work with that'
Lionel Messi-inspired Barcelona overwhelmed Manchester City as Ivan Rakitic's strike secured a 1-0 win.
Juventus coach Massimiliano Allegri's decision to consign 40 million euro ($44.16 million) forward Paulo Dybala to the substitutes' bench appears to have backfired after his side's failure to score in their last two games.
Diego Costa continued his rich vein of form as he helped leaders Chelsea to a 3-0 win over Aston Villa while Louis van Gaal enjoyed only his second Premier League win as Manchester United manager following a 2-1 victory against West Ham.
Carlos Tevez is getting paid 615,000 a week at Shanghai Shenhua, making him the world's best-paid player. His salary is now more than Cristiano Ronaldo's and Lionel Messi's!
Argentina's Lionel Messi and Carlos Tevez, English third tier player David Hall and U.S. women's international Carli Lloyd were among players included on the shortlist for FIFA's goal of the year award on Friday.
La Liga leaders Real Madrid were thumped 4-0 away by city rivals Atletico Madrid to open up the Spanish title race, while Chelsea strengthened their hold on top spot in the English Premier League after a 2-1 win at Aston Villa.
Chelsea returned to their early-season form to open up a five-point lead in the Premier League, Cristiano Ronaldo and Lionel Messi continued to make mincemeat of La Liga defences and Juventus extended their lead in Serie A. In France, Olympique Lyonnais retained top spot with a 2-0 win at RC Lens.
Argentine clubs River Plate and Boca Juniors will contest the second leg of the Copa Libertadores final, South America's equivalent of the Champions League, in Madrid on Sunday.
Coach Massimiliano Allegri dismissed suggestions that the newly crowned Serie A champions have nothing to lose
Juventus need to beat Manchester City to reach the Champions League knockout stages on Wednesday and many fans still believe the best way to achieve this is by fielding Alvaro Morata and Paulo Dybala together in attack.
Juventus look set to wrap up their fourth successive Serie A title in the next seven days although the crowd violence which marred Sunday's 2-1 defeat at Torino could take the shine of their celebrations.
Argentina's new coach Edgardo Bauza has set his mind to wooing Lionel Messi back from international retirement as he ponders his squad for next month's South American 2018 World Cup qualifiers. Bauza was named on Monday to replace Gerardo Martino, who resigned a month ago after steering Messi's side to two successive Copa America finals which ended in penalty shootout defeats to Chile.
Seydou Keita cancelled out a superb Carlos Tevez free kick as second-placed AS Roma fought back with 10 men for a fiery 1-1 draw at home to leaders Juventus who stayed on course for a fourth successive Serie A title on Monday.
It has been a long time coming but Spain look as if they may finally have solved their number nine problems following Alvaro Morata's two goals in the 3-0 win over Turkey.