Betting on the favorite for me is the best way, most of the time the underdog has lost, at least that's what I've observed since I entered this world of sports betting.
Anyone that feel like waste more money on betting can benon underdogs and lose more amount of money. The way the betting sites are setting the odds neither make underdog nor good clubs to favour someone while betting. Any bet can be a lost bet. One thing about bet is that you can take the underdog to win but it may draw while the chance is low.