Sachdev, mentored by another former champion Sanjay Sawant at his city-based academy Cue Schooling, recorded a 4-2 victory over Oil and Natural Gas Corporation's Kumar after he trailed 1-2 in the best-of-seven encounter at the Cricket Club of India's Wilson Jones Billards Room.
The youngster notched up a 62-18, 6-91, 3-75, 66-42, 80-16, 70-25 victory, with one half century break worth 53, with which he pocketed the fifth frame for a crucial 3-2 lead against the former Asian billiards and snooker champion before cruising into the pre quarter finals.
First round results: Divya Sharma (Har) bt Aditya Agarwal (Mah) 4-2; Shahabaz Adil Khan (BPCL) bt Sidraj Shah (Mah) 4-2; Rahul Sachdev (Mah) bt Alok Kumar (ONGC) 4-2; Sourav Kothari (ONGC) bt Manav Panchal (Mah) 4-1; Manan Chandra (BPCL) bt A Gandhi (Mah) 4-0; Himanshu Jain (TL) bt R Girish (Rlys) 4-1; Kamal Chawla (Rlys) bt Nitesh Madaan (Rlys) 4-1; Pankaj Advani (ONGC( bt Aravind Kumar (Rlys) 4-0; Sumit Talwar (Puj) bt Taaha Khan (Mah) 4-3.