The 22-year-old Indian, playing his first competitive match since his Davis Cup encounter against Croatia's Marin Cilic in March, had received a bye in the opening round.
Nagal is the only Indian in the men's field with Prajnesh Gunneswaran, ranked 132, missing out.
Nagal, who is currently India's highest-ranked singles player at 127, recently defeated second seed German Daniel Masur 6-1, 6-3 in the final match at the tournament.
The Indian Wells was cancelled on Monday due to coronavirus outbreak, leading to frustration among players involved in the tournament.
Sumit Nagal could win just one game in the match which the 2014 US Open Champion won 6-0 6-1 in just 56 minutes.
The hosts will be led by world number 37 Marin Cilic and the 2014 US Open champion is only top-50 singles player in their ranks.
Although the event suffered a mild set back with the withdrawal of the top seed Ricardas Berankis owing to medical reasons, the field still boasts of good players.
Prajnesh Gunneswaran remains a step away from entering the Australian Open main draw, but Sumit Nagal crashed out after facing a first-round loss in the qualifiers.
The only twist in the tale that 2019 served was the rise of the Next Gen power in the form of Daniil Medvedev and Stefanos Tsitsipas.
Nagal, who is currently ranked 130 in the ATP rankings, after having a good season during which he qualified for the US Open main draw and also took a set off the legendary Roger Federer
Sumit Nagal earned his first-ever Davis Cup win, beating Hufaiza Mohammed Rehman 6-0 6-2 in the second singles which lasted 64 minutes.
In their first meeting this year at the Challenger level, 25-year-old Ramkumar, seeded sixth, notched up a 6-4, 7-6 (5) win over Indian No 2 Sumit Nagal, seeded third, in a 97-minute thriller.
The USD 54,160 hard court event is only the second ATP Challenger that India is hosting this season after the Chennai Open, where nine Indians had competed.
With both Nagal and Ramkumar now available, India will have its best singles players taking on Pakistan.
India's tennis ace Sumit Nagal has climbed up to a career-best 129 in the latest ATP Rankings.
India's ace tennis player Sumit Nagal reached the semifinals of the ATP Challenger Campinas as he registered a straight-set victory over 13th seed Cerundolo.
Nagal figured in the government's Target Olympic Podium Scheme (TOPS), receiving financial support for some time but was later dropped.
India's Sumit Nagal has made a jump of 26 places to achieve a career-best ranking of 135 in the latest rankings issued by ATP.
India's tennis ace Sumit Nagal won his first ATP Challenger title of the season as he beat Facundo Bagnis of Argentina.
Following an impressive show in the Banja Luka ATP Challenger tournament, Sumit Nagal jumped 15 places to a career-high 159th position in ATP Rankings.
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