DELHI, March 9, 2013 (AFP) - The 25-year-old Lahiri birdied the 18th hole from 10 feet in regulation play to force extra-time before claiming his third Asian Tour victory with a four-foot birdie conversion on the same hole at the Delhi Golf Club.
Khan, 22, played a final round of six-under-par 66, which included a closing birdie, but he could not prevent a dominant Lahiri from grabbing the winner's cheque of US$54,000.
Lahiri was overjoyed to taste victory for the third time.
"I feel great winning here again. In regulation play standing over the 10 -footer, I took my time and decided what I wanted to do. I think this is the calmest I've ever been in that situation," he said.
Khan, who was awarded US$33,000, said: "I played really good. Holed good putts and played really well this week. Starting with a par 72 on the first day and losing in a play-off, it's disappointing."
Overnight leader Siddikur of Bangladesh closed with a 73 to finish third, four shots behind the play-off duo while Shiv Kapur of India settled for fourth place after a 70.
Thailand's Pawin Ingkhapradit and Australian rookie Matthew Stieger ended in tied fifth place.
Scores after round four (par 72):
273 - Anirban Lahiri (IND) 71-68-66-68, Rashid Khan (IND) 72-64-71-66. (Lahiri wins with a birdie in the first play-off hole)
277 - Siddikur (BAN) 68-68-68-73.
278 - Shiv Kapur (IND) 69-70-69-70.
279 - Pawin Ingkhapradit (THA) 70-69-71-69, Matthew Stieger (AUS) 70-71-68-70.
280 - Namchok Tantipokhakul (THA) 69-75-68-68.
281 - Boonchu Ruangkit (THA) 72-69-70-70, Chan Kim (USA) 67-68-74-72, Chapchai Nirat (THA) 66-75-67-73.
282 - Jake Higginbottom (AUS) 70-70-73-69, Baek Seuk-hyun (KOR) 71-69-72-70, Antonio Lascuna (PHI) 71-73-67-71, Khalin Joshi (IND) 66-69-71-76.
283 - Shankar Das (IND) 73-72-71-67, Sattaya Supupramai (THA) 70-71-72-70, Jason Knutzon (USA) 69-74-70-70, Vinod Kumar (IND) 73-73-66-71, Ajeetesh Sandhu (IND) 70-70-71-72, Adam Groom (AUS) 71-71-69-72.