Nestor, who played his 51st Davis Cup match and came in with a 32-11 doubles record, is 43rd amongst doubles players in the current global rankings, with Pospisil sitting in 111th.
"It's been a insane month for me", the 18-year-old said.
Yuki Bhambri staged a remarkable comeback and almost caused an upset in his 6-7 (2), 4-6, 7-6 (6), 6-4, 1-6 loss to world number 51 Denis Shapovalov.
On the other hand, Bhambri had won his only other five-setter in Davis Cup five years ago in similar fashion, when he overcame a two-set deficit against New Zealand's Daniel King-Turner in Chandigarh. Alas, he did it his way, dropping the third and fourth sets to stretch this one well past midnight Eastern, as a Northlands Coliseum crowd of around 6,000 dwindled by more than half by the time the final service ball was tossed.
But three hours and 16 seconds after it began, he'd lost in four sets 5-7, 7-6, 7-5 and 7-5 to India No. 1 Ramkumar Ramanathan.
Here's all you need to know about watching India's Davis Cup matches live. However, with the second set at 3-3, it was Shapalov who finally got the break and took an important 4-3 lead. Of late, both Yuki and Ramkumar have shown encouraging results and thus instil hope that they are capable of pulling off a win over the left-handed Shapovalov.
The best-of-five tie marks the first ever meeting between Canada and India. "They said it was important to set your tone from the beginning".
"First of all, I had a lot of fun out there. I believed in myself in the fifth", Shapovalov said.
However, Yuk Bhambri won a break point of his own and forced the third set to a tie-break. Schnur, who played college tennis in North Carolina and turned pro this summer, won the first set and was in a position to win the second but wasted five break points.
The Canadian defeated Bhambri 7-6 (2), 6-4, 6-7 (8), 4-6, 6-1 in a match that lasted almost four hours. He wasted six more in the tenth game of the third set and converted only two of four in the fourth set to lose the rubber in three hours 16 minutes. With wins over Rafael Nadal and Jo-Wilfried Tsonga in August and a run to US Open fourth round as a qualifier, Shapovalov was expected to steamroll through the lowly-ranked Indians.