Earlier, Ramkumar Ramanathan beat Brayden Schnur to give India a 1-0 lead over Canada.
Yuki Bhambri staged a brilliant comeback after going two sets down but eventually ended up short against 18-year-old Denis Shapovalov as Canada levelled the Davis Cup World Group Play-off tie 1-1 on Friday.
Yuki Bhambri, India's no. 2 and World no. 157, went down 6-7, 4-4, 7-6, 6-4, 1-6 against Shapovalov.
Winning the first set 7-6 (2) in a tiebreaker, the Canadian teenager then bettered the performance and won the next set 6-4, but fell 7-6 (6) in the third and then 6-4 in the fourth.
Shapovalov, however, bounced back in a big in the final set and secured the win in what was a marathon clash that lasted nearly four hours.
"Boys played with a lot of heart...the plan was to fight regardless of the score and Ram swung a losing battle and Yuki almost did too," Indian captain Mahesh Bhupathi said. "The pressure remains on them. If we fight like this anything is possible."
This defeat would rankle Yuki for sometime as Shapovalov had started feeling the heat following the Indian's perseverance. The left-handed Shapovalov unleashed his power-packed game from the beginning and Yuki was mostly left to defend but after taking the third set from the home favourite, it was the Indian who dictated the terms.
An early break in the fifth set again shifted the momentum in Shapovalov's favour. The Canadian found his mojo after breaking Yuki in the third and broke him again in the sixth game to take a 5-1 cushion and clinched the issue with a crushing forehand winner. Yuki proved that his recent win over world number 22 Gael Monfils was no fluke and he give a good fight to the world's top players.
Here is how it all went down:
Earlier, Ramkumar Ramanathan battled past a fighting Brayden Schnur in a marathon four-setter to give India a 1-0 lead over Canada on day one of the Davis Cup World Group Play-off tie.
The 22-year-old Ramkumar, ranked 154, outlasted the impressive debutant 5-7, 7-6(4), 7-5, 7-5 in the first singles, which lasted three hours and 16 minutes.
The Chennai lad thus remains unbeaten in the Davis Cup in 2017 season, having won all five matches he has played.
Canada and India are now tied 1-1 after Day 1. Daniel Nestor and Vasek Pospisil will be in doubles action on Saturday against Rohan Bopanna and Purav Raja.
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 "Denis Yuki Davis Cup")
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