RIO DE JANEIRO -- One world record, one Olympic gold. That done, Almaz Ayana can start thinking about her best event.Ayana of Ethiopia delivered a stunning start to track and field at the Olympics on Friday with a world record in the 10,000 meters, wiping away the competition just after the halfway point and striding away to win with effortless grace.After crossing the finish line, she raised her hands in triumph and then stopped, coming to realize what she had done in only her second 10,000 at an important meet: Her time of 29 minutes, 17.45, had shaved 14.33 seconds off the 1993 mark of Chinas Wang Junxia.It was not my plan, Ayana said. Once she got going, no plan was going to stop her.At age 24, she beat the best from a previous generation. Kenyas Vivian Cheruiyot, 32, a four-time long- distance world champion placed a distant second, 15.18 seconds behind. Ayanas 31-year-old teammate, Tirunesh Dibaba, took bronze.It was a bittersweet moment for Dibaba, who had been trying to become the first woman to win an individual event for three Olympics in a row. She barely stood a chance once Ayana got going, but worked to get another medal for Ethiopia.Still, she said, I now have a bronze for my son, dedicating the medal to one-year-old Natan.Dibaba and Ayana held hands afterward -- a symbolic transition to a new era.Running with Dibaba gave me the energy, she said.If David Rudisha of Kenya provided an iconic moment four years ago in the London Olympics with his world record in the 800, it could be tough to find a better race than Ayanas in Rio, with nine more days to go.And she has her favored 5,000 to come. She is convinced she still has enough in the tank for an encore. For the 5,000 I prepared well, and I dont think (running the 10,000) will make any difference. In Rome this spring, Ayana went within a second of the world mark in the 5,000, even though pace setters failed to set a steady pace.Fridays conditions were ideal -- cool and overcast with a damp track from morning rain. But the 60,000- capacity Olympic stadium was only a quarter full to see Ayanas accomplishment.The top 13 finishers all had milestones, with continental, national or personal records tumbling, perhaps making it one of the greatest womens long-distance races in history. Even double Olympic champion Tirunesh Dibaba had never run faster.Even though Kenya and Ethiopia are fierce rivals, it was the early strength of Alice Nawuwona that made Ayanas record run easier. The Kenyan delivered her at ideal pace at the halfway point, and Ayana put in a short sprint to sap any confidence from her rivals.Steadily, the world record became a possibility. 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The 21-year-old has three goals, four assists and a plus-5 rating in 24 games with the American Hockey Leagues Oklahoma City Barons this season.SYDNEY -- Fans came to catch a glimpse of American hot shot Jordan Spieth yet they were treated to a peak at the future of Australian golf as amateur Curtis Luck took a share of the lead midway through the opening round of the Australian Open at Royal Sydney.The 20-year-old west Australian shot a five-under round in the company of Spieth and Aussie veteran Geoff Ogilvy, Luck firing seven birdies and just two bogeys in an excellent start to his campaign.Spieths round could have been better, but the American was left to lament a poor flop shot on hole No. 8 and admitted he was still adjusting to putting on the Poa annua grass greens.I really like the design of this golf course, its a fun, kind of classic course to play, Spieth said.These Poa annua greens are just getting a little bit into my head, but as the week picks up and it becomes more difficult to hold greens in regulation I like where Im at.Having received a fortunate bounce on hole No. 7 that gave him a shot at eagle, a putt he lipped out and settled for birdie, Spieth then saw just how quickly Royal Sydney could also play the demon after his tee shot at the driveable No. 8 skipped through the green.But the American was more upset about the duffed flop shot that followed, that led to an untimely bogey, and promised to keep attacking the shorter par-fours for the rest of the week.I was actually very pleased with the tee shot there [on No. 8], so IIll just look at it as; I found something on four today.dddddddddddd..in my driving, Spieth said.I was much more patient into what I was working on the last few weeks and I kept through it there on No. 8 and hit it too good. If I mishit it I probably make birdie there instead.So Im not upset about that, what Im upset about is the execution of the flop shot which is normally a strength of mine around the greens.Luck, meanwhile, showed no signs of nerves and opened his day with a birdie on No. 10.The amateur, who twice qualified for the Masters next season with wins at the US Amateur and the Asia-Pacific Amateur, looked relaxed throughout his round and hit some superb wedge shots that often saw him inside both Spieth and Ogilvy.Yeah plenty, Luck said when asked if hed had fun. Fortunately I had two great playing partners in Geoff and Jordan and they made it a lot of fun for me and obviously I played quite well.So yeah it was quite enjoyable out there today.Ogilvy finished at -2 after having several putts burn the edges on the slick Royal Sydney Greens.Lucas Herbert was the other early leader on Thursday after a blemish-free five-under 67.The highest-ranked Aussie in the field, Adam Scott, and Aaron Baddeley went out in the afternoon wave with?the breeze beginning to strengthen. ' ' '