The stress of the game is starting to affect the players, some faster than others.  One player in particular might not make it to the end of the game.
I'm losing strength.
أنا أفقدُ قوّتي
Estoy perdiendo fuerzas.
Estoy perdiendo fuerzas.
Je n’ai plus de force.
Sto perdendo le forze.
Estou perdendo minhas forças.