Learn Italian: Ci vuole sempre più autocontrollo durante un combattimento. - You need more and more self-control during a fight.

The verb volerci is perfect for expressing a general or abstract necessity, meaning 'it takes' or 'one needs' in a broad sense. If you used hai bisogno di, it would sound like you are talking to a specific person about their personal needs, rather than stating a general truth about what a fight requires.

If the English translation says 'You need', why is the verb conjugated in the third-person singular (ci vuole)?

In Italian, the thing that is needed is the actual grammatical subject of the sentence. The literal translation is 'More and more self-control is required'. Because the noun autocontrollo is singular, we use the singular ci vuole. If the required thing were plural, the verb would change to ci vogliono.

How does sempre più translate to 'more and more'?

In Italian, you do not repeat the word for 'more' to express an increasing amount or intensity. Instead, you use the fixed phrase sempre più (literally 'always more'). You can use this structure with nouns, adjectives, or adverbs, such as sempre più difficile for 'harder and harder'.

How is the noun combattimento formed?

It is built from the verb combattere (to fight). Adding the suffix -mento turns the action into a noun. This is exactly how the English suffix '-ment' works to create nouns from verbs, as seen in words like 'development' or 'management'.