Sports bet requires skills because a gambler needs to have strategy to analyze games to increase his chances of winning but you cannot take away the place of luck to determine wins. What I can say is that skills are necessary for sports bet but it takes luck to win, this is so because sports are played by human beings and animals that can have good and bad days so previous performances is not a guarantee that they must perform excellently all the time. If you take away luck from sports bet that means that everybody will analyze correctly and they will always win, it won't be gambling anymore. I think that despite a gambler's skills to analyze games they should not underestimate luck so bettors should use amounts that they can afford to loose for their bets because skills are not enough to give wins.