John Isner, naked, on a shirt

They say that grandparents will do anything to show how proud
they are of their grandchildren. This would be Exhibit A.

Tennis player John Isner posed for ESPN’s The
Magazine’s Body Issue without much fanfare (unlike a certain
other
person we know
) until his grandfather decided to rock this
shirt:

Now that’s taking pride in your grandkids. Funny thing,
Isner’s
tennis.com bio lists his nickname as
“Grandpa.” We may now know why.