2 sentences for 说不定 (shuō​bu​dìng — uncertain)

1. 谁能赢这场比赛还说不定。

   shéi néng yíng zhè chǎng bǐ​sài hái shuō​bu​dìng.

   It's still not certain who's going to win this match.

   Source: Tatoeba

2. 这场比赛谁赢谁输还说不定。

   zhè chǎng bǐ​sài shéi yíng shéi shū hái shuō​bu​dìng.

   It's still uncertain who will win or lose this game.

   Source: Dong Chinese Dictionary