Don't worry too much about Gordon Hayward ... 'cause God's got his back -- so says his family.
"Thanks to everyone for all the messages, prayers & love," Hayward's dad tweeted late Tuesday night ... after his NBA superstar son snapped his ankle in his 1st game with the Celtics.
"We know that Gordon will be fine & God has big plans for him! #Godisgoodallthetime," he added.
The official diagnosis was a fractured left ankle ... putting the rest of his season in jeopardy.
Warning: The following video is extremely graphic.