Sid Lowe: La Liga's top six all square off this weekend in a feast of football. It'll tell us much about their respective chances in the title race.
Both Arda Turan and Rafinha have been ruled out of Barcelona's La Liga game against Valencia on Saturday.
"We're facing a Valencia who are possibly a little unknown as Prandelli has only been there for a short time," Luis Enrique said.
Messi scored a hat trick as Barcelona swept past Manchester City in the Champions League on Wednesday.
Dybala's agent Gustavo Mascardi previously said Barca offered Juve double the €32 million they paid to Palmero in 2015 for the striker.
Neymar has finally put pen to paper on a new five-year deal he agreed with Barcelona.