Coaching Pays Off for Henman in Canada
"It's good," he said after his first round victory over the Thai on Monday.
"It's obviously still early days. It's been a week. Larry came to London last week and then obviously traveled over here.
"I am pleased with the way things are going, and I am realistic that it's not suddenly going to change overnight. But, you know, I am happy with the way things are progressing.
"I mean, I enjoyed that independence that I talked about when I was working without a coach but, having said that, I was always under the impression that I needed to get a coach.
"This game is tough enough as it is, let alone trying to do everything on your own. So, you know, I am happy to have Larry's input.
"I think he has a great deal of experience with the players he has worked with and the time that he's been around the game and, you know, hopefully I can benefit from that."
British number one Henman appointed American Stefanki as his new coach earlier this month, Reuters reported.
The partnership will be reviewed after the U.S. Open to determine whether to continue on a long-term basis.
Stefanki, 43, a former tour player, has previously coached John McEnroe, Marcelo Rios and Yevgeny Kafelnikov.
Henman has been playing without a coach since he split with long-time mentor David Felgate in April.
Felgate coached Henman for nine years, during which time he won seven ATP titles and reached number five on the world rankings.