Based on my research:
- Sportsbet
- Cloudbet
- Onehash
I recommend these websites for tennis betting. There is no such thing as instant deposits and withdrawals yet in the cryptocurrency gambling world as the posters above mentioned.
I do not really recommend two of it, sportbet and cloudbet sure have this promotions and events going on and I can say it is really droolling but overall they always have some issues on their site so I would not really recommend to play there. I would suggest to play on nitrogensport which is really standard with the current situation right now, others of this, I do not recommend it at all