All what u said is completely right,but u have to know that fasting is not bad to health unlike alcoholics or smoking.An footballer can play normally while fasting PROVIDED following a special diet during the night,and this what exactly Real madrid did to their muslim players last season,they provided the players with Dietitians who helped them in that.
Sissoko himself admitted during Ramadan that he wasn't playing well because of fasting.
Are folks calling him a liar? That's much, much worse than me calling him an inept footballer.
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