Sindhu, lived up to her reputation by recording a hard-fought 21-20 21-20 win over world no.3 Juliane Schenk of Germany.
Srikanth, who recently won the prestigious Thailand Open, doubled the lead with a 21-18 21-16 win over Saurabh Verma in the men's singles.
The men's doubels pair of Marcis Kido and Mathias Boe then sealed the tie for Warriors with a tight 21-15 21-16 win over Arun Vishnu and Sanave Thomas at the GMC Balayogi Indoor Stadium.
Tien Minh Nyugen beat RMV Guru Sai Dutt 21-12 21-18 in the second men's singles and the mixed doubles pair of Joachim Fischer and Ashwini Ponnappa defeated Markis Kido and Pia Z Bernadet 21-16 21-14 to end the day for Pune with a win.
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Earlier, Sindhu and Schenk were engaged in a battle of attrition but the Hyderabadi-girl pulled off a sensational win in two close games.
"I have played against Schenk twice but this is the first time I won and am feeling really happy. Also I am thrilled and touched to see my college friends and teachers who have come here to support me," said Sindhu after her match.