Former Juventus striker Gianluca Vialli has rated the club's chances of progressing to the final of the Champions League at "75%".
The Old Lady hold a slender advantage over the reigning champions going into tonight's second leg at the Bernabeu having edged to a 2-1 victory in Turin last week.
Vialli acknowledged that Massimiliano Allegri's side would have to cope with the pressure from home supporters in the Spanish capital, but is "very optimistic" about their chances.
"I'm very optimistic and I think Juve have a 75% chance of going through," he told Sky Sports News.
"It's going to be necessary to play with the head as well as the legs and in this respect I think Juventus are better.
"An important factor is also going to be the Santiago Bernabeu, where the atmosphere is certain to be very hot, but Juve must play with courage and not be distracted by the Spanish pressure."
Juventus have not reached the final of the Champions League since 2003. Barcelona await the winner of this year's tie.
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