another photo puzzle

Just to try and pass the time in these lockdown Sundays, here's another mystery photo for you to puzzle out. The clue is this: ever since he was a kid, my husband has been practicing a sports discipline that involves close contact. That, of course, is out of the question now that we have to practice social distancing and around the house I find signs that he has been sorely missing it. This is one of them. Can you guess what I took a picture of? If you are really good, perhaps you can also guess what is the discipline that my husband misses so much.

I will post a photo that contains the answer tomorrow night.