After being dropped for the Sri Lanka series, Yuvraj was also not considered for the first three one-dayers of the five-match series against Australia at home, starting tomorrow, but Patil seemed optimistic about another comeback.
"It's fitness and form," Patil told PTI when asked about the old warhorse's future in international cricket, keeping in mind the World Cup.
The former India batsman and coach added:"I am not the selector now. Two years is too long a period and the kind of injuries you have seen, there is too much workload on each player."
"Yuvraj was like a God's gift, I have been his ardent fan and I will remain an ardent fan of Yuvraj. But he has to put runs on the board and he has to prove his fitness."
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A slew of significant milestones that he reached in the recent 5-0 ODI whitewash of Sri Lanka amply demonstrated Mahendra Singh Dhoni's continuing influence in the limited overs game, and Patil termed him a "special player".
Patil, who headed the selection committee from 2012 to 2016, oversaw a period of transition in Indian cricket with the likes of Sachin Tendulkar, Rahul Dravid and VVS Laxman walking into international sunset.
"We had a very difficult task of replacing players such as Sachin Tendulkar, Virender Sehwag, Zaheer Khan and get these youngsters. Somewhere, in my mind, I am very happy that the bold decisions which we took are giving tremendous results."
He also lauded the current selection committee's move to rest the top spin duo of Ravichandran Aswhin and Ravindra Jadeja, saying his panel had also tried doing similar things.
He acknowledged the Indian cricket team ?s dominating world cricket at the moment, but it remains to be seen how it performs in South Africa and England next summer.
"Indian team is at the top now, they are in top form, they are in top fitness, the combination, everything is going right. But, if you look at the history of cricket, about every 10 years things changed.
"It's cricket, it's a funny game, you have to go out there, start afresh. Every day is fresh, every over is fresh, every ball is fresh and to repeat that is not easy. India is playing great cricket," he said.
"It will be an acid test for India (touring South Africa and England), and for that matter if you look at the history of each team, whenever each team has travelled away from their home countries they have struggled.