Annie Rose admits she finds it hard to believe her son is an Olympic champion after Justin claimed golf's first gold medal for 112 years on Sunday.

Rose's mother and his wife Kate watched every shot of his nerve-wracking triumph in Rio, which was only secured on the 72nd hole after a thrilling duel with Open champion Henrik Stenson.

And the moment was made extra special when they learned that Sunday was Father's Day in Brazil, Rose's father Ken having died from leukaemia in 2002. It was also Father's Day in the United States when Rose won the US Open at Merion in 2013.

"It was fantastic," Annie told Press Association Sport. "It was wonderful for all four days. We've watched every hole and having the hole-in-one (on Thursday) was just so exciting.

"That was so good and to see my son out there, he has worked so hard on his golf ever since he was little and to see him playing in an Olympics was enough as it was and then to actually top it off with the gold...

"When I was a little girl growing up, who would ever have thought I would have a child who was a gold medallist. That actually puts it into perspective.

"Justin has absolutely loved being here, Kate has, we all have and really embraced it. It's wonderful that you can play for your country like this."

Rose's wife Kate is a former gymnast who competed for Britain at international level, although her speciality of acrobatic gymnastics is not part of the Olympic programme.

"I grew up watching the Olympics and that was the pinnacle of my sport," she said. "Obviously a lot of golfers didn't have that so maybe it was a little slower for some of the golfers, but I think certainly the next generation of golfers will probably grow up thinking of the Olympics as a pinnacle of golf.

"I think any guys that have been here will also now view the Olympics very differently. Golf in the Olympics is a very special experience and one that I hope will get to continue, even beyond Tokyo."

While many players cited the threat of the Zika virus as their reason for withdrawing from the Games, Rose's participation was never in doubt.

"We were always coming," Kate added. "We wanted to bring the children and we had a little doubt about that but ended up not, but for him to come - never in question.

"Sunday was very emotional. It meant a lot to the whole team, the family, the caddie - everyone worked so hard and it was a big focus for the year.

"It's once every four years but it could be a once-in-a-lifetime opportunity so it had a lot more significance than any other Sunday I've been to."