The run-up to the Rio Olympics, saw a flurry of great performances at the New Balance Indoor Grand Prix. Adding to the meet's illsutrious history, Natasha Hastings set a new American Record in the 300m, running 36.25, erasing Allyson Felix's previous best from 2007. The Men's 600m saw a near record as Boris Berian won in 1:15.51, just missing the AR. In the Men's Mile, Nick Willis showed his class again, winning by over two seconds in 3:53.27. Twice Olympic Champion Meseret Defar announced her return from maternity leave with a world leading 8:30.83 win in the Women's 3000m, just fractions off the meet record she set 11 years before. World Junior Champion Dawit Seyaum, one of Ethiopia's newest talents, put away a top field in the Women's 1500m, winning in 4:01.86, while Brenda Martinez, runner-up in 4:04.58, made herself the third fastest American in history.