it's ok if it's just injury. remember that one good player is not going to make a lot of difference in your team, especially if your players are weak. if you have a 6 star player and the rest of the squad is 1 or 2 stars, dont expect to win every match. you should have bought a bunch of 4 stars instead of one 6 star player. P.S: use the red packs to let him recover from injury