Portaferry's Ciara Mageean made the perfect start to 2020 by breaking her own Irish indoor 1,500m record in Boston, the 27-year-old clocking 4:06.42 to best the previous record of 4:06.76 which she ran in Athlone last year.
Australia's Jessica Hull took victory in 4:04.14 ahead of Germany's Konstanze Klosterhalfen (4:04.38).
Mageean chose not to go with the early pace of the leaders but unleashed a flying finish to get up to third at the World Indoor Tour event.
"The pace didn't go out that quick and the top three girls got a gap on me but I told myself to keep the head and move my way up," Manchester-based Mageean said. "I'm delighted to have finished so strong and it's nice to come off knowing there's more in the tank. To start my season with 4:06 indoors, I'd have taken that in any outdoor season so I'm over the moon."
Mageean had come off a block of altitude training in Albuquerque, New Mexico, where she logged 70-80 miles a week, a base of fitness she believes will serve her well in months ahead.
"Albuquerque was fantastic and I'm starting to get the hang of altitude camps. My first one in Font Romeu, I thought I was going to die - but I'm feeling really strong and this is the best place I've ever been in January. That's a great place to be going into the Olympic year," she said.
She will bypass this year's World Indoor Championships - which take place in Nanjing, China at the end of March - but will make an attempt on the Irish indoor 3,000m record in Athlone next month before racing in Madrid and then closing out her indoor campaign at the Irish Senior Championships.