Vignesh earned his first GM norm at the 2015 Qatar Masters Open by defeating Mateusz Bartel and Wei Yi, and drawing with Nguyễn Ngọc Trường Sơn, Sam Shankland, Vladimir Fedoseev, Hou Yifan, and Francesco Rambaldi.
[2] Vignesh earned his second GM norm at the 24th Abu Dhabi Masters 2017, where he won against Karthikeyan Murali and Bogdan-Daniel Deac, and drew with Mircea-Emilian Parligras, Parham Maghsoodloo, Tsegmed Batchuluun, and Constantin Lupulescu.
He won against Farrukh Amonatov and Vitaly Sivuk, and drew with Vadim Malakhatko and Vitaliy Bernadskiy.
[2] In January 2023, Vignesh became a GM when his live rating surpassed 2500 by defeating Ilja Schneider in the final round of the 24th NordWest Cup, also winning the tournament.
[3] In August 2023, Vignesh won the 11th Pontevedra Masters, where he was undefeated during the tournament and finished half a point ahead of second place.