防不胜防

tā de qiú lù duō biàn dǎ de duì fāng fáng bù shèng fáng

他的球路多变，打得对方防不胜防。

His opponent couldn't stand up to his varied and fast-changing tactics.

yù dào zhè yàng de duì shǒu shì fáng bù shèng fáng de

遇到这样的对手是防不胜防的。

Defence was well-nigh impossible against such opponents.