At one stage Yuki was a break up, serving for the opening set but lost his serve and eventually the set. After drawing parity, Yuki twice lost his serve to fall behind 0-3 in the decisive set and never recovered.
In the absence of an injured Yuki, a lot would depend on how the left-handed Prajnesh, who won a singles bronze medal at the Asian Games, performs.
Saina Mirza and Saketh Myneni proved too strong for the Chinese Taipei combination of Hsien Yin Peng and Hao Ching Chan to win the gold in the mixed doubles final at the Asian Games.
Their commitment to country questioned after the pull-out from the Asian Games, India's top tennis players on Wednesday tried to put their decision in perspective by saying that they have an obligation to earn their "bread and butter".
'We did not want India to either default or forfeit this tie'
Andreas Seppi experienced some early hiccups before getting past Ramkumar Ramanathan 6-4, 6-2 in the opening rubber, while 22-year-old Matteo Berrettini made a winning Davis Cup debut, cruising past India number one Prajnesh Gunneswaran 6-4, 6-3.
A summary of sports events and sports persons, who made news on Saturday
Vishnu Vardhan won his second Challenger level title of the season with Japanese partner Toshihide Matsui but four other Indians, including Leander Paes, tumbled out of various ATP events across the globe.
A summary of sports events and sports persons, who made news on Monday
The iconic Leander Paes has ruled out immediate retirement from the competitive tennis, saying his comments were misconstrued and he actually aims to capture another Chennai Open trophy next year and motivate his new partner to win his maiden Grand Slam title. Paes and Brazilian Andre Sa began the 2017 season with a defeat against Indian team of Purav Raja and Divij Sharan in the opening round on Wednesday night.
This was due to the fact that they had already won the Khel Ratna, the country's highest sporting honour.
The Indian kabaddi contingent made an impressive start to its campaign at the 18th Asian Games with the women's team mauling Japan and the men's side beating Bangladesh and Sri Lanka in Jakarta on Sunday.
Summary of sports events and persons who made news on Thursday
India's dominance went uncontested for the fifth successive day at the 12th South Asian Games, as its shooters, wushu players and track-and-field athletes annihilated competition to sweep most of the gold medals up for grabs, in Guwahati, on Wednesday.
A summary of sports events and sports persons, who made news on Monday
Coming into the tournament 21st in the WTA rankings, the Czech won 3-6, 6-3, 6-4 in two hours and 16 minutes to add to her triumph in St Petersburg earlier this month.
Summary of sports events and persons who made news on Thursday
World number 30 Berrettini saved five points in the marathon second set tiebreak and held on to win it 13-11 for his third ATP crown in last 11 months.
Nagal said he would look to play more ATP Tour events this year but for that he would have to first improve his rankings.
India's World Group hopes suffered a huge setback as Rohan Bopanna and Purav Raja lost the crucial doubles rubber to hand Canada a 2-1 lead in the Davis Cup Play-off tie, in Edmonton, on Sunday.
A summary of Indian athletes' showing at the Asian Games on Tuesday.
Summary of sports events and persons who made news on Friday
The Games' Sport-Specific Regulations (SSR) has been developed jointly by IOC and the IFs to determine the impact of a confirmed positive COVID-19 case and its management in competition formats and structures.
A summary of sports events and persons who made news on Tuesday
Top seed Stanislas Wawrinka scored a clinical 6-3, 6-1 win over Benjamin Becker to progress to the quarter-finals of the ATP Chennai Open even as second seed Michael Youzhny conceded his singles match in yet another the player pull out in Chennai.
Croatia clinched a place in next year's World Cup finals on Sunday after holding Greece to a goalless draw at the Georgios Karaiskakis stadium in Athens to complete a 4-1 aggregate victory in their playoff tie.
Cycling: Olympic champion Vogel stable after operation
Summary of sports events and persons who made news on Wednesday
A summary of sports events and persons who made news on Monday.
The 42-year-old Leander Paes's dream of appearing in a record seventh Olympics may remain just that if Rohan Bopanna decides to play with a player ranked lower than the world No 46.
A summary of sports events and persons who made news on Thursday.
Thursday's match was just Venus Williams's seventh of the year and first since January's Australian Open, where she fell to Simona Halep in the round of 32.
A summary of sports events and persons who made news on Monday
Images from the matches played at the All England Lawn Tennis and Croquet Club, in Wimbledon, London, on Monday.
A summary of sports events and sports persons, who made news on Monday
Serbian Djokovic, 31, needed elbow surgery in February to cure a problem that surfaced in 2017, but after some jarring defeats he returned to the kind of domination he achieved in 2015, winning Wimbledon and the US Open.
Sania, the country's finest woman doubles player, who began the year with the number one ranking, closed it at number 9.
Summary of sports events and persons who made news on Monday.
A summary of sports events and sports persons, who made news on Sunday
A summary of sports events and sports persons, who made news on Sunday