Juventus -- runners-up twice in the last three seasons -- head to Athens needing a win to ensure their passage to the knockout phase.
But Gonzalo Higuain will play after scoring the winner against Napoli at the weekend despite a broken hand.
"Higuain will be on the pitch tomorrow, because he is doing well both physically and mentally," said Allegri.
"Tomorrow could be decisive. We are still evaluating Buffon and Pjanic, who is suffering from a muscle strain."
"We can't afford to wait and see what Barcelona's result will be," continued Allegri.
"Either we win or we run the risk of exiting the Champions League. Tomorrow (Tuesday), our approach must be spot on. We have to be patient and take our chances to win the game."
"With (Giorgio) Chiellini out, either (Daniele) Rugani or (Mattia) De Sciglio will play. (Mario) Mandzukic will be available as well."
Allegri added that it would be an important test for Argentina striker Paulo Dybala "to return to his highest level" and score his first Champions League goal this season to add to his 12 in Serie A.
"We understand the importance of the game and we know that it is not going to be easy for us -- the first match against Olympiakos at home was complicated and now we are playing in their stadium.
"We have to be focused and careful tomorrow because it is a complicated game.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
