Question

I am confident in winning the game correct sentence​

Answer 1

I am confident in winning the game.  This is a correct sentence.

'in' is used as a preposition in the sentence

• A preposition is a word preceding a noun or pronoun and connects them with another word.
• These are used to connect subjects, objects, people, time, place.  
• Examples of prepositions are: of, off, over, in, at, above, upon, into, for, etc.