Bet365 is my top pick for online sports betting. They have a huge selection of sports, and Iโve always found their odds fair
Agreed with the others, Cloudbet is a good site you can go on. It's quite decent too if you're a newbie with sportsbetting.
I have a new recommendation; Stake actually has worked very well for me, you should try it out!
@lucianop Fellow Stake user here. It has also been quite good for me. It's promotion is going on like crazy here, since last couple years.