Hello, I'm looking to trade a few vintage hockey cards of Hall of Famers that I have for a signed tennis ball. I'd mainly be looking for one from a player on the men's tour. My first priority would be one signed by Alexandr Dolgopolov if anyone has one, but I'd be interested in basically anyone as long as they're decent.

Here are the cards I have available for trade:
1979-80 Topps Mike Bossy 2nd Team AllStar BV $10 EX
1979-80 Topps Bobby Hull BV $15 EX
I also have a 1979-80 Topps Gilbert Perreault EX that I will throw in with the Hull and Bossy.

Please let me know if anyone has any signed tennis balls. Thanks.