actually I don't like soccer... I saw my nephew who likes soccer even he memorized the names of club players from everywhere. borrow money from me.. even though sometimes he often loses.. but like soccer gambling habits.. he doesn't think about the risks.. most importantly he feels happy and happy.. from that I can conclude that we must be able to control ourselves from habits gamble.. don't regret it later.. money can change someone's situation
Even if he likes betting on his favorite team or understands how sports betting works, what he does is a wrong practice which is to borrow money from someone to gamble, and if he gets in the habit of that, it can be destructive for him in the future because he will later on start taking bigger loans only to gamble and if he manages to lose that money, he can get himself in big trouble that he might not be able to come out from.
So it's obviously better if you advise him either not to gamble or not to borrow money for it because borrowed money if lost in a bet will be a problem since he wouldn't be able to pay it off, now it's you he is borrowing from so he doesn't have much of a problem, but he will if the lender is an outsider.