After losing to two-time major winner Martin Kaymer in his first match, Thongchai outclassed his American throughout their match and even found himself five up at the turn. Furyk responded with victories on four holes on the back nine, but was never in with a real shot of taking the math from the Thai veteran.
Following Kaymer's shock loss to South Africa's George Coetzee on the same day, the group is wide open since all four players have one win and one loss so far this week.
"He tried to catch up and he played well on the back nine," Thongchai said.
"I was five up after nine holes. We made only a few bogeys and there was pressure on the back nine. He putted well with three birdies on the back nine for his comeback. But on 17, he pushed his show and I managed to win. It's a good win for me."
Lahiri beat Ryan Palmer in his first match but fell just short against the former US Open champion, despite never trailing in the match.
In fact, the Asian number one led by one going into the final hole, but back-to-back birdies from the Englishman was proved too much for the Indian ace.
"It was a battle all day. That was the first time I was up on any two days (on the 19th hole). That was a nice one to pull out," said Rose.
"Anirban is a great putter. The first hole, I looked like I had it won comfortably but he produced a 30 footer and on the next hole, he holed a 40-footer which I knew was going to be a touch match.