The London Olympics bronze medalist staved off the challenge from Sindhu 21-14 21-17 in the women's singles summit clash, which lasted 40 minutes at the Babu Banarasi Das Indoor Stadium here. (Agencies)
The two-time champion was tested by her younger colleague but Saina kept her nerve to eventually break a 15-month title drought after appearing in her 22nd final of her international career.
"It's an emotional moment for me. Loved the support I got. Lucknow has been my favourite city. I won my first title here in 2009. It feels good to win again. The win was more special as it came after such a long time," she said moments after her victory.
"Sindhu played very well. It was a great match and the crowd enjoyed it. She is great player, and also in top-10. I am happy that I pulled it off.”
"I was little nervous as I was playing in a final after a long time. But things went well for me," said Saina, who had last reached a final in the French Super Series in October, 2012.
Luck was on Saina's side as a couple of controversial line calls helped the 23-year-old to lead 3-0 initially and then she extended it to 5-0.
Sindhu earned her first point when Saina hit wide but the Commonwealth Games champion kept the pressure on her with some smashes to lead 8-2.
Sindhu slowly started retrieving the shuttles and engaged in rallies to narrow down the lead to 5-8 but she was erratic at finishing the points and lagged 5-11 at the break.
After the breather, Sindhu scored with the help of her accurate over the head smashes and smart net play to narrow it to 11-14. But she once again faltered with the length of her returns to allow Saina lead 19-13.
The London Olympics bronze medalist staved off the challenge from Sindhu 21-14 21-17 in the women's singles summit clash, which lasted 40 minutes at the Babu Banarasi Das Indoor Stadium here.