With a floating target in the River Thames and a set of giant Olympic rings overhead, Sergio Garcia and Dustin Johnson took turns whacking balls at a makeshift green.

Golf will likely look a little different when it’s included at the Olympics for the first time in more than 100 years at the 2016 Rio de Janeiro Games, but not like this.

“Courses usually don’t move this much, but it’s definitely going to be fun,” Garcia said of the stunt Monday under London’s historic Tower Bridge.

So will golf at the next Olympics.

“It would be really cool to be part of the opening ceremony,” Johnson said. “Really cool.”

Garcia pitched three out of five shots onto the artificial green with a lob wedge from about 75 yards. Johnson nailed two, or maybe it was three.

Even the players weren’t sure where some of the purple balls — the color of the London Olympics — ended up.

Behind the floating green, curious Londoners peered over the edge of the famous bridge in bright evening sunshine to see what was going on.

There was even a long-jump style slow clap for the players as they took their shots. Nothing like the silence when golfers tee off at Augusta National, or any other top course.

While organizers haven’t yet settled on the format for golf in 2016 — maybe stroke play, maybe match play — both players were excited for its inclusion.

“I think it’s going to be very special if I can represent my country,” said Johnson, who is from the U.S. “Being an Olympian is more about being an athlete and being part of something more than just you.”

Garcia, who is from Spain, remembered the 1992 Barcelona Olympics as his favorite games. No surprise.

Johnson was all about the U.S. “Dream Team” in Barcelona.

“Those moments stick,” Garcia said. “After these Olympics go by it will be the one we’re in and everyone will be talking about it.”