sú huà shuō / yī wù xiáng yī wù / zài lì hai de duì shǒu / yě kě néng yù dào kè xīng

俗话说，一物降一物，再厉害的对手也可能遇到克星。

As the saying goes, every opponent has a weakness, and even the strongest rival may eventually meet their match.