The sports betting are predictable no need to take too much risk. First thing is you know that sports well and you should be aware of players and team performance that's it.
There is nothing that could be predicted and if you could predict it just like you said then you wouldnt spend your time in here anymore as you might be rich now. There is no such thing exist and every gambling games are made to make player lose with the house edge therefore it will never be profitable in long term