Questa penalità dà un vantaggio all'avversario.

Because penalità is treated as a feminine noun in Italian, so the demonstrative has to agree with it.

• questa = this for a feminine singular noun
• questo = this for a masculine singular noun

So:

• questa penalità = this penalty

Even though penalità ends in -à and does not look like a typical feminine noun, it is still feminine.

It is singular here.

Some Italian nouns ending in an accented vowel, like -à, often have the same form in the singular and plural:

• la penalità = the penalty
• le penalità = the penalties

You tell whether it is singular or plural from the article or modifier:

• questa penalità = singular
• queste penalità = plural

So questa makes it clear that the noun is singular.

The accent distinguishes dà (he/she/it gives) from da (from, by, at, depending on context).

Here:

• dà = from the verb dare = to give

Examples:

• Lui dà un consiglio. = He gives advice.
• Vengo da Roma. = I come from Rome.

So the accent is there to avoid confusion.

It is the present indicative, third person singular, of dare (to give).

So dà can mean:

• gives
• is giving, depending on context

In this sentence:

• Questa penalità dà un vantaggio all'avversario.
• literally: This penalty gives an advantage to the opponent.

In Italian, nouns like this usually need an article or determiner. So un vantaggio means:

• an advantage

Using vantaggio without un would generally sound incomplete in this sentence.

Compare:

• dà un vantaggio = gives an advantage
• ha vantaggio = not natural in standard Italian here
• ha un vantaggio = has an advantage

Italian often uses articles where English might sometimes omit them.

All' is a contraction of:

• a = to
• il / lo-type article form, depending on the noun

With avversario, the standard full form is:

• a + l' = all'

So:

• all'avversario = to the opponent

This is very common in Italian:

• al ragazzo = to the boy
• alla ragazza = to the girl
• all'amico = to the friend
• all'avversario = to the opponent

Because Italian normally uses the definite article in many places where English does not.

So:

• all'avversario literally = to the opponent

In context, English might translate it more naturally as:

• gives the opponent an advantage or
• gives an advantage to the opponent

Italian prefers the article here; that is normal.

Yes, absolutely.

The Italian structure is:

• dà un vantaggio all'avversario
• literally: gives an advantage to the opponent

But in natural English, you could also say:

• This penalty gives the opponent an advantage.

Both express the same idea.

This is a very normal Italian word order:

• subject: Questa penalità
• verb: dà
• direct object: un vantaggio
• indirect object: all'avversario

So literally:

• This penalty
  • gives
    • an advantage
      • to the opponent

Italian can sometimes change word order for emphasis, but this neutral order is very common and natural.

It would sound unnatural in standard Italian. The natural form is:

• Questa penalità dà un vantaggio all'avversario.

The article un is important here. Without it, the noun phrase feels incomplete.

If you want other natural alternatives, you might say:

• Questa penalità favorisce l'avversario.
• Questa penalità avvantaggia l'avversario.

But with dare, un vantaggio is the normal structure.

A helpful approximate pronunciation is:

• al-lav-ver-SA-rio

A few points:

• all' links smoothly into the next word
• the vv is pronounced as a stronger/doubled consonant
• the stress is on sa: avversàrio

So the whole sentence is roughly:

• KWES-ta pe-na-li-TA da un van-TA-jjo al-lav-ver-SA-rio

That is only an approximation, but it can help with rhythm and stress.

In this form, yes: avversario is masculine singular.

You may also see:

• l'avversario = the male opponent / the opponent (masculine form)
• l'avversaria = the female opponent
• gli avversari = the opponents (masculine plural or mixed group)
• le avversarie = the female opponents

So if the opponent were explicitly female, you might say:

• Questa penalità dà un vantaggio all'avversaria.

Yes, but the meaning changes slightly.

• Questa penalità = this penalty
• La penalità = the penalty

So:

• Questa penalità dà un vantaggio all'avversario. focuses on this specific penalty
• La penalità dà un vantaggio all'avversario. means the penalty gives the opponent an advantage

Both are grammatical; they just express different levels of specificity.