Jeev's 74 on final day meant he slipped after being 35th overnight.
"I did manage to get all four rounds and that was important. Yet, I must confess it was a disappointing end to the week. I felt I never really had any momentum going," Lahiri said.
Lahiri had birdies on fourth and 18th and dropped shots on second, seventh and 15th. Jeev had four birdies against six bogeys. Lahiri and Jeev move onto Irish Open next week alongwith Shiv Kapur
Rookie Byeong hun-An, son of two Olympic table tennis medallists - father Ahn Jae-hyung represented Korea and his mother Jiao Zhimi represented China - won his maiden title with a masterly final round of seven-under 65.
He finished at 21-under and a record total of 267 and he was a whopping six shots ahead of the flamboyant Miguel Angel Jimenez (67) and Thongchai Jaidee (68), who both ended at 15-under.
