Everybody loses sometime.
Everybody has an off day.
Everybody gets injured at some point.
Everybody gets ill.
Learn to accept those days, events and situations with grace.
That doesn’t mean you shouldn’t keep trying to win all the time, play your best every match, avoid getting injured and trying to stay health.
It just means that we are human.
Learn and grow from each experience and you will be a better person and player because of them.