i would do it as well. in this scenario it's not about individual, it's also playing the game in favour of their country. if they win it they would have to play their compatriots and only 1 of them could progress to finals. if by losing 1 game that is kind of pointless and yet both will still qualify and be in different bracket which means "if" they could win their following game, they will only meet in the finals, why not? afterall sports is about trophies and medals. by throwing this match, the country "might" win gold and silver medal. badminton is a sport where there are no substitution and country can send multiple team to participate in the same competition. they are all trained under one roof by the same person and paid for by the same government/association. they are teammates and i dont see anything wrong to lose for the benefit of their teammates and country. in a different scenario, "IF" i'm the top seed and have no fear of any opponent that comes to me. let's say i'm wxl/yy and all my compatriots have not qualified for the knockout stages. i would have played my best and try to win all the matches.