With nearly every golfer in the field seemingly going backwards on the DLF Golf and Country Club's Black Knight course, Sharma rode out a few blips to bring in an even par card and a share of the lead at seven under par 209 on the penultimate day of the for $1.75 Hero 54th Indian Open here on Saturday.
Shubhankar Sharma was unable to keep pace with Wallace as he slipped from a share of first to seventh with a three-over 75, posting a trio of double-bogeys in a frustrating round.
The 21-year-old Shubhankar dropped five shots, including a double bogey at the 17th hole. Grillo, who was 11-under after first 36 holes to lead the field after the first two days, dropped three shots in first four holes even as Shubhankar sank a birdie at the fifth to stay just one stroke behind the Argentine.
Thereafter Sharma's challenge faded away as he managed four birdies but also conceded three bogeys and a double-bogey.
As the day progressed Shubhankar struggled to a three-over 75 to finish tied 7th, while the Englishman shot four-under 68 in regulation play and then overcame compatriot Andrew Johnston in the play-off to win his second European Tour title.
Sharma stayed on top of the leaderboard with a birdie on the 18th
Shubhankar is now in line to become the 10th Indian to win his National Open.
"I played great", Wallace said. It was a mixed bag as everything happened. To hit two shots like that is exactly why I play the game. It was a birdie after a chip in from the fringes at the last hole which earned him a place at the top after he held the lead briefly on his back nine as fortunes fluctuated too frequently on the third day. I'm looking forward to tomorrow.
"I am very pleased with the birdie at the last, which allowed me to grab a share of the lead".
The tees were moved back on certain holes and the pins were quite challenging and I am keen to see if it is going to be the same on Sunday and how the players adjust to it. It's the second week in a row I'm in the leading group. "Importantly, I kept bouncing back to keep myself in the hunt", summed up Shubhankar.
"Beef really had a great round today because I was playing fantastic and thought I might have been a few more clear".
Other Indians: 293 - Jyoti Randhawa (72, 72, 76, 73), Kshitij Naveed Kaul (70, 76, 77, 70); 294 - Anirban Lahiri (72, 73, 75, 74); 295 - Khalin Joshi (72, 68, 81, 74), Ajeetesh Sandhu (68, 76, 74, 77); 297 - Karandeep Kochhar (75, 72, 76, 74); 299 - Udayan Mane (72, 75, 79, 73).
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