Don’t lose hope until the end.
No pierdas la esperanza hasta el final. (No pierdas la esperanza hasta el final.)
"It’s not over till it’s over, we can still win this game."
"No está todo perdido hasta que se acaba, aún podemos ganar este juego." (No esta todo perdido hasta que se acaba, aun podemos ganar este juego.)
to fail to do what one promised
the basic practical details of something
family is the most important priority in life
to use the same tactics as one’s opponent
to do something extremely well or successfully
the least reliable or secure part of a system or group