Local girl Sindhu beat her Hyderabad rival Supanida K, an experienced player from Thailand, 15-8, 14-15, 15-5 to seal the issue in favour of Chennai.
Twice World Championships bronze medallist Sindhu had a comfortable 15-8 win in the first game, but her Hyderabad rival came back strongly to take the second game 15-14.
Sindhu, however, came back strong and defeated her rival 15-5 in the deciding game to clinch the match in her favour.
"The second game was very tough as she bounced back very strongly. Our intense battle for each point continued in the third game. I re-worked on my game-plan and played added aggression to counter Supanida, which yielded a good win for me."
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The day began with the mixed doubles match between Carsten Mogensen-Jwala Gutta of Hyderabad and Chennai Smashers' Chris Adcock-Pia Zebadiah. The Chennai pair had a comfortable 15-7, 15-7 victory over their Hyderabad rivals.
Wei had an easy 15-3 win in the first game, but the
gritty Chennai player, a seasoned shuttler from Indonesia, gave a stiff resistance and went on to win the second game 15-12. Wei, however, had the last laugh with a 15-8 win in the deciding game.
Lee Chong Wei said: "A very good match and I enjoyed it. First game went as per my game-plans as I managed to dominate the game. Sony Dwi came very strongly in the second game and gave a tough fight to take the game. He surprised me with his attacking skills and quick returns. In the third game, I just kept calm and concentrated on my strategies, which yielded positive result in my favour."
Santoso, a seasoned player from Indonesia, appeared determined not to let his Indian opponent gain an upper hand.
The last match of the day -- the Trump match of Hyderabad -- was the men's doubles in which Carsten Mogensen-Markis Kido of Hyderabad beat Chris Adcock-Pranav Chopra of Chennai 15-12 15-13.