2013
Not true. Most of his shirts this year were pretty long.
Back in ST days they often covered whole pockets and were pretty lose overall (ironically the retail versions were the slimmest out of all of his sponsors).
His Uniqlo stuff was often called slim and tight but it actually was much looser and longer than Nike, Adidas or UA stuff.
While Novak didn't tuck his shirt it often looked like it because of the way the fabrick fell on his body.
The only time he did wear a "short" shirt would be AO 2018.