Tseng shot 77 on Friday, three shots higher than the next highest score among players who made it to the clubhouse before darkness suspended the second round. She opened with a 75.
While Tseng has shown some promising form of late, she left the course Friday 131st in a field of 132 players.
“You definitely feel for a player, when they struggled as much as Yani did today,” Webb said. “Before our delay last night, or actually until her last tee shot last night, I actually felt like I saw a bit of Yani of old. She didn't make any putts, but she was hitting it very nicely off the tee and hitting some good iron shots. Then she just hit one poor tee shot right at the end of our day, after the horn went off, and that was it.
“I feel for her because she's going to do everything she can, technically, but I think she's got to overcome a few demons before we see her back to playing the way we know she can.”
Tseng reigned as Rolex world No. 1 for 109 weeks before losing the top spot to Lewis here two years ago. She has fallen to No. 67 in the world rankings. She won the Founders Cup in 2012.
“Yani’s definitely doing a lot of really good things,” Lewis said. “You can see some of the physical changes in her golf swing starting to get there.
“What I've seen, in a couple rounds with her, is she's kind of gotten off to good starts, and then one thing kind of happens, and whether it's a bad break, or one bad swing, it kind of throws her off ...
“I think it's there. It's just, I think, a little bit mental. Mentally, she's got to get a little bit stronger there.”