我敢肯定你背后肯定有高人在指点，这句用英文怎么说啊

I'm sure there was someone teaching you.

我敢肯定你背后肯定有高人在指点
I'm sure you've got instructions from some expert in secret.

I dare to say you must have got suggestions from some experts.
I dare to say you must have some experts behind.

I'm sure he was coached to play.

I'm sure somebody good is behind you.