The race was fast from the outset with Kenya’s Alice Aprot Nawowuna setting the early pace, taking the field through 3000m in 8:52 and 5000m in 14:46, indicating a finishing time well inside 30 minutes.
Ayana soon took over the lead and increased the pace, opening up a gap on world champion Vivian Cheruiyot. It soon became clear that she was operating at world record pace, while her pursuers were also on course for huge lifetime bests.
Cheruiyot finished second in a Kenyan record of 29:32.53 while 2008 and 2012 Olympic champion Tirunesh Dibaba set a lifetime best of 29:42.46 to take bronze.
Early race leader Aprot missed out on a medal but was rewarded with a PB of 29:53.51.