A cute little tennis theme today, and if you're a bit flexible with your imagination, you can see the long central entry, CONTEMPTOFCOURT (37A: Dislike for tennis?) as a net, and then the two theme entries above and below, touching opposite sides, are kind of like a volley going back and forth. And the CALLS (51D: "Let" and "Fault," from a chair umpire) come in right at the center edge, where the umpire sits! I like it a lot, and the silly cluing is just icing on the cake.
The two long Down answers are both solid. INSERTCOIN (10D: Arcade game instruction before playing) brings me back to my youth. Ahh... remember arcades? Do they even still exist?
BIGAMY (6D: Problem with more than one marriage?) and PISA (39D: Italian city you might be "leaning" toward visiting) were amusing, and a brother of mine is in Seoul at this very moment, so KOREA (12D: Locale for Pyongyang and Seoul) was fun to see.
Nothing much that I got HUNG up on, and nothing to WHINE about. Overall, a solid start to the week!