The win at Parma on Saturday was especially impressive given the Gialloblu's form.
But the competition steps up again, after a convenient drop which enabled the Bianconeri to regain their confidence.
Los Merengues come to Turin on Tuesday to attempt to secure their passage to the last 16 and put Juve in a perilous position, especially so given Galatasaray face Copenhagen once again.
Antonio Conte has wisely rotated his squad and made each member of the squad feel like they are playing their part this season.
Even Marco Motta, who was on the outside this summer, as it looked certain that he would be sold, has been surprisingly handed a new lease of life in the wake of Stephan Lichtsteiner's injury.
Paul Pogba continues to amaze, snatching the winner at the Tardini last weekend and further complicating Conte's midfield selection.
It appears to have forced Conte into a change of formation, one that was trialled at the Stadio Santiago Bernabeu.
So Juve could line up in a 4-3-3, which would push Claudio Marchisio into an attacking trident with Carlos Tevez and Fernando Llorente.
This will enable Pogba to continue to shine in the midfield with the ever-present Arturo Vidal and Andrea Pirlo.
A back four will be brought out once again, which did not include Leonardo Bonucci in the first encounter between the sides.
The 26-year-old was dropped for Angelo Ogbonna, who occupied the left-back role, while Martin Caceres played at right-back—both of whom could be considered primarily centre-backs.
But after Giorgio Chiellini's red card in the first game between the sides, the tactical dilemma has been postponed as such, with Bonucci resting at the weekend in order to prepare himself for Tuesday's clash.
Andrea Barzagli will partner him and Ogbonna—who was particularly shaky in the first game—will return to left-back, with the Uruguayan Caceres coming back into the side at right-back.
The only battle as such appears to be Fabio Quagliarella, who returned from injury at the weekend, and the Neapolitan will challenge the Spaniard Llorente to spearhead the attack.
It is a thankless task having to face Real Madrid in back-to-back group stage matches, as it hands the advantage to Galatasaray. With the Turkish side having seen Juve drop points in Copenhagen, they knew that the double over the Danish champions would put them in firm control of claiming second place in the group.
It is therefore imperative that Juve avoid defeat, while a loss could all but end their hopes of qualification, leaving them with a maximum final total of eight points and Gala already on seven points, should Roberto Mancini's side win at Parken.
It is a risk to persist with a formation sparsely used by Conte in his two-and-a-half seasons in Turin, but he will know that it is up to him to make the big calls and turn this side's fortunes around.
It should be a fantastic encounter, and hopefully the referee will not spoil the match by making consistently poor calls, as was the case in the first match between the sides.
Probable line-up (4-3-3): Gianluigi Buffon; Martin Caceres, Andrea Barzagli, Leonardo Bonucci, Angelo Ogbonna; Arturo Vidal, Andrea Pirlo, Paul Pogba; Claudio Marchisio, Fernando Llorente, Carlos Tevez.
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