The USGA argued the grooves were too close together , they insisted the distance between grooves should be measured at the point where the edge rounding ceased .
Ping argued the distance between grooves should be measured from the vertical groove wall .
The USGA argued the grooves were too close together , they insisted the distance between grooves should be measured at the point where the edge rounding ceased , while Ping argued the distance between grooves should be measured from the vertical groove wall .