Just because you lose some % against a stronger team is not a bad thing. Your opponent team overall quality is not indicative of how good they are. For example he might have one or two players with very high White skills in certain areas such as shooting, finishing, fitness, speed etc but overall he might only be 4* or 5*.
For example, I have a 5* legend with 1% greys but 400% finishing.
So you should not worry too much about dropping a few % if a player is injured or suspended.