Hyderabad: Germanys Vincent Keymer emerged as the sole leader in the Masters section at the end of the second day in the Quantbox Chennai Grand Masters 2025 in Chennai on Friday, after a commanding win over Indias V. Pranav. Meanwhile, American GM Ray Robson delivered the biggest upset of the day, defeating Vidit Gujrathi in a sharp tactical battle. Top-seed Arjun Erigaisi of Telangana was held to a draw by Dutch GM Jorden van Foreest, while Anish Giri and Nihal Sarin shared the spoils in