O vencedor derrotou o adversário sem batota.

Yes. O means the and agrees with a masculine singular noun.

In Portuguese, it is very normal to use the definite article with nouns where English might sometimes leave it out. Here:

• o vencedor = the winner
• o adversário = the opponent

Both nouns are masculine singular, so both take o.

Yes, vencedor means winner or the one who won.

It comes from the verb vencer, which means to win or to defeat, depending on context.

Examples:

• o vencedor da corrida = the winner of the race
• sair vencedor = to come out victorious

So in this sentence, o vencedor is simply the winner.

Both are possible, but they are not exactly identical in feel.

• derrotou comes from derrotar = to defeat
• venceu comes from vencer = to win / to beat

In this sentence, derrotou o adversário strongly focuses on beating the opponent.

Compare:

• O vencedor derrotou o adversário. = The winner defeated the opponent.
• O vencedor venceu o adversário. = also possible, but slightly less natural because vencer already contains the idea of winning, and o vencedor venceu... can sound a bit repetitive.

So derrotou is a very natural choice here.

Derrotou is the pretérito perfeito do indicativo, which is usually the main past tense for a completed action.

It corresponds here to English defeated.

The infinitive is derrotar:

• eu derrotei
• tu derrotaste
• ele/ela/você derrotou
• nós derrotámos (in European Portuguese)
• vós derrotastes
• eles/elas/vocês derrotaram

So derrotou means he/she/you defeated.

Because Portuguese normally uses an article before a specific noun.

Here, o adversário means the opponent, referring to a particular opponent in the situation.

If you said just adversário in a normal sentence like this, it would usually sound incomplete or less natural.

So:

• derrotou o adversário = defeated the opponent

Not exactly.

Adversário means opponent or adversary. It is often used in:

• sports
• debates
• competitions
• conflicts where two sides are opposed

It does not necessarily mean a personal enemy.

For enemy, Portuguese would more often use:

• inimigo

So:

• adversário = opponent
• inimigo = enemy

Sem means without, and batota means cheating or trickery.

So sem batota means:

• without cheating
• fairly
• without any foul play

In European Portuguese, batota is a very common informal word for cheating, especially in games, sports, schoolwork, or any unfair behaviour.

Examples:

• Isso é batota. = That’s cheating.
• Ele ganhou sem batota. = He won without cheating.

Yes, it is especially common in European Portuguese.

In Brazilian Portuguese, learners are more likely to hear:

• trapaça
• fraude
• cola (in the sense of cheating in an exam)
• roubo in some sports contexts, depending on meaning

A European Portuguese speaker would very naturally say:

• fazer batota = to cheat

So this sentence sounds very natural for Portugal.

Because it works naturally there as an adverbial phrase describing how the opponent was defeated.

The structure is:

• O vencedor = subject
• derrotou = verb
• o adversário = object
• sem batota = extra information: without cheating

Putting it at the end is the most neutral and natural order.

You could theoretically rearrange parts for emphasis, but this version is the standard one.

In practice, it describes the way the action happened: the winner defeated the opponent without cheating.

So the natural interpretation is:

• the victory was achieved fairly

It is not usually understood as a separate description like the winner, who was not a cheat. It is tied to the action derrotou.

In European Portuguese, adversário is pronounced with the stress on sá because of the written accent:

• ad-ver-SÁ-rio

The accent mark in á shows the stressed syllable.

A rough English-friendly guide:

• ad-ver-SAH-ryoo

But remember that European Portuguese often reduces unstressed vowels, so the real pronunciation is more compressed than that rough guide suggests.

The accent in adversário marks the stressed syllable and helps show the correct pronunciation.

Without going too deep into spelling rules, the written accent tells you that the stress falls on:

• sá

So:

• ad-ver-SÁ-rio

Accent marks in Portuguese are important because they often show:

• where the stress goes
• sometimes vowel quality as well

Yes, that is also correct, but the meaning shifts slightly.

• O vencedor derrotou o adversário sem batota.
  Focus: the winner defeated the opponent without cheating.

• O vencedor ganhou sem batota.
  Focus: the winner won without cheating.

The first sentence includes the opponent directly; the second does not. So both are fine, but they are not identical in emphasis.

The sentence is mostly standard Portuguese overall, but batota is the strongest European Portuguese signal.

Everything else is broadly understandable across the Portuguese-speaking world:

• o vencedor
• derrotou
• o adversário
• sem

A Brazilian speaker would understand the sentence, but batota sounds much more Portuguese-from-Portugal than Brazilian.

Yes.

Some more formal or neutral alternatives are:

• sem fazer batota = without cheating
• sem recorrer a batota = without resorting to cheating
• de forma justa = fairly
• sem fraude = without fraud (more formal and narrower in meaning)

So if you want a more everyday European Portuguese phrase, sem batota is excellent. If you want something more formal, de forma justa may fit better depending on context.