PHOENIX -- If you've come here looking for bright spots from the Mavericks' season-opening loss to Phoenix, you're out of luck.Oh, OK. Jalen Brunson was at least productive for a moment when he took a charge then drilled a 3-pointer to help get the Mavericks back in a game in which they were playing catch-up all night.And Dwight Powell was an energizer when he was on the floor.Beyond that, it was varying degrees of slop in the Mavericks' 121-100 loss to the Suns.The point-guard play left plenty to be desired.