Spieth fired seven birdies in a six-under-par 66, holding off tenacious playing partner Charley Hoffman to win by two strokes with an 18-under-par total of 270.
Spieth has won 11 times on the PGA Tour but is hoping to end a lengthy dry spell dating back over three years to the 2017 British Open.
Lahiri's rise up the leaderboard will inject the confidence he needed in his game following a lean spell in 2021, where he has missed five cuts in seven starts.
Spain’s Jon Rahm overcame nerves and a two-shot penalty to claim victory at the Memorial Tournament on Sunday and replace Rory McIlroy at the top of the world rankings.
Turkish Airlines Open: Global traveller Shubhankar Sharma gears up for final series of 2018 European Tour
Shubhankar Sharma is ready for another three weeks on the European Tour's Final series on the Race to Dubai which travels from Antalya, Turkey to South Africa and finally Dubai. This week Sharma plays the Turkish Airlines Open, the first of three events in the final series for the 2018 European Tour season.
Andrew Johnston gets the better of Paul Dunne to win Hero Challenge in front of vociferous local support at Canary Wharf
Andrew Johnston held off the challenge of Paul Dunne in the finals to claim the Hero World Challenge trophy in front of a vocal local crowd in Canary Wharf.
"For him (Shubhankar) to achieve all the things he has done, he has been phenomenal. He has got so much talent and the things that he has done in the last couple of months have been phenomenal," Wallace said.
Everything went wrong for overnight joint leader Shubhankar at the challenging DLF golf course as he found bushes, water bodies, hit the flag once and also struggled with his putting to drop three double bogeys, three bogeys against six birdies to total four-under 284.
Shubhankar Sharma displayed admirable temperament to grind out an even-par 72 to share the lead after the penultimate round of the $1.75 million Hero Indian Open at the challenging DLF course in New Delhi on Saturday.