World Championship silver medallist Sindhu entertained the handful of badminton aficionados at the Siri Fort stadium with a come from behind 12-15 15-7 15-9 win over Mumbai Rocket's Beiwen Zhang in an exciting womens singles match.
World No 5 Son then starred in Mumbai's Trump match and scripted a 15-11 15-5 win over Thailand's Tanongsak Saensomboonsuk in the second men's singles match to make it 3-2 in favour of his team.
In the first men's singles, Sameer Verma, who is coming back after recovering from a shoulder injury, suffered a heartbreaking 14-15 15-10 14-15 loss against France's Brice Leverdez in a thrilling three-game match as Chennai roared back in the contest, making it 1-1.
Sameer, who had reached the finals at Hong Kong Open last year and clinched the Syed Modi Grand Prix Gold early in the year, saved two match points to make it 14-14 before an opportunist Brice produced a tap at the net to rob the Indian off a win.
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In women's singles, Sindhu took little time to get off the mark as Beiwen looked in better control and led 8-6 at one stage before closing out the opening game.
The Indian stamped her authority in the second, rushing to a 11-4 lead. Sindhu dished out some spectacular smashes and roared back into contest when Beiwen found the next twice.
The decider started on an aggressive note with the duo engaging in some fierce rallies. Beiwen managed to eke out a 7-5 lead before Sindhu entered the break after her rival committed errors at the net.
"I was making too many unforced errors in the first game and by the time I could make a comeback she finished the game, in the second game though it was equal till 4-4, but I was confident of a comeback. In the third game she went into the lead but I was not nervous and after the change of sides I finished comfortable. It was not an easy match," Sindhu said after the match.