The phrase "inferior opponents" means the other person or team is not as skilled, capable, or strong as someone else.
Sentences with «inferior opponents»
Didn't always work, especially against inferior opponents. (sbnation.com)
People are too optimistic about these young players based on displays against inferior opponents. (justarsenal.com)
If Italy slip up against Costa Rica tomorrow, they will not be the first team in this World Cup to suffer from over-complacency in the face of inferior opponents, and probably not the last either. (italianfootballdaily.com)