Website

http://www.Bet365.com/

A very big British bookmaker, excellent service, great live support, also a very good poker room here by the way. You can find some competitive odds on tennis here, and limits certainly are very high.

I strongly recommend everyone visiting their website.

Bonuses:

After your first bet of at least $50 you get a free $50 bet. Then if you bet 10 wagers of at least $50 each you also get a free $50 bet in the end. If your minimum bet is at least $10 then every 10 bets you'll get a free $10 bet, but the overall maximum free bets sum is $100 which you should bet within 90 days from your registration date.

Register with this link to claim your bonus!