So a couple of things off the bat: 1) The material is possibly the softest, most wonderful t-shirt material I have ever experienced. It's like wearing a cloud. 2) I have zero idea what the tennis reference is but as a 25 year fan and participant of tennis and enjoying the greatest band ever, this was a perfect crossover. The shirt I ordered was an XL. I am 6'1.5" and about 220lbs. It fit well, a touch snug around the waits (my fault which I'm obviously working on) but otherwise great. My wonderful fiance washed it and dried it, which I fully overreacted in response and nearly immediately apologized for with a very delicious take out dinner from our favorite pasta shop. That said, drying it will shrink it! It just got shorter, not tighter, so that wasn't a huge deal. I have a very funky belt collection that it actually works to show off with, so blessing in disguise? Gotta look on the bright side folks, life is too short! In sum, I highly recommend this shirt. Again, I am not exactly sure what the tennis reference is but it's delightful. WFB III