The reigning Asian Tour number one traded two birdies against three bogeys at historic Royal Troon, which was greeted by rain, cold temperature and winds following a glorious opening day under sunshine and blue skies.
Lahiri, who has made the cut three times from four appearances at the oldest Major, said: "I managed to control the damage as I didn't play too good. The idea was to get off to a good start but it wasn't to be.
After a bogey on four, the 29-year-old, who played alongside Keegan Bradley and Sergio Garcia, birdied the famous par three eighth hole nicknamed Postage Stamp with a 10-foot conversion. He dropped two more shots on nine and 10 when conditions turned before salvaging his card with a birdie on 16th hole.
Also Read
Lahiri is hopeful of posting under-par rounds over the weekend in his bid to improve on his best Open finish of tied 30th achieved at St Andrews last season and equal or better a top-five outing at the PGA Championship last year.
"I'll be hoping to post two scores in the red. That should be pretty gettable for me, if it's deep enough in the red, then maybe I can give myself a chance on Sunday," he said.
"This year, I've been the least nervous. It's also my fourth Open and it's nice to get more comfortable starting in weeks like this, knowing what is achievable from what I've done from Majors of the past. I feel like I play my best golf when I focus really hard during the Majors. Hopefully the last two days are evidence of that," he said.
The birdie on eight was particularly satisfying for Lahiri.
"As hard as that hole played yesterday, it's going to be one of the holes you might see a few more birdies today, just because of how the winds are today. I hit a good shot and finally made a 10-footer. It's been a grind on the greens for me. I don't think I putted too badly but just burnt a lot of lips," he said.