Brazilian fans gathered around the first tee at Olympic Golf Course on Wednesday morning might look twice at golf bag belonging to Ireland.

Lisa Maguire will be carrying the clubs.

Leona Maguire will be swinging them.

They're twin sisters. And what's more, they’re teammates at Duke University.

The Maguire sisters during a practice round Tuesday before women's golf begins at the Rio Olympics. (AP Photos/Chris Carlson)

"She's nearly good enough to be here this week," Leona Maguire says. "I don't think many people can say they have that good of a player on their bag."

They are identical twins, though separated thus far by performance.

Leona Maguire has been the No. 1 amateur in women's golf for the last two years and has four victories in her two seasons at Duke. Lisa Maguire competed in only three tournaments for the Blue Devils last year.

Maguire is among three amateurs who qualified for the 60-player field. When she qualified for the Olympics _ the first for women's golf since 1900 _ it was an easy decision to invite her twin sister along as her caddie.

"I'd love to play, but this is the next best thing," Lisa Maguire said. "It's been a good experience to share."