What was the call here? Merino was not pleased at all…

Delfina Merino was very upset with the umpire. Argentina lost 2-1 against Germany for the Semi-finals of the 2017 World League. When Argentina was trying to find the draw in the last moments of the match, Merino had the chance to go straight to the German circle.

After a long pass from the defense, she stopped the ball but the ref called it against. Was there foot? Was it a backstick? Share your thoughts!