प्रतिद्वंद्वी मैच हारता है।

Here प्रतिद्वंद्वी means opponent, rival, or competitor.

In this sentence, it is being used as a noun:
प्रतिद्वंद्वी मैच हारता है। = The opponent loses the match.

It can sometimes also work like an adjective in other contexts, depending on how it is used, but here it clearly refers to a person/team, so it is a noun.

Hindi normally uses Subject–Object–Verb order.

So in this sentence:

• प्रतिद्वंद्वी = subject
• मैच = object
• हारता है = verb phrase

That gives:

• प्रतिद्वंद्वी → the opponent
• मैच → the match
• हारता है → loses

So the structure is very natural for Hindi: The opponent the match loses.

In English, this becomes: The opponent loses the match.

Good question. In Hindi, को is not always required for direct objects.

With many verbs, especially when the object is a general thing rather than a specific person, the object can appear without को.

So:

• मैच हारना = to lose a match
• खेल जीतना = to win a game
• किताब पढ़ना = to read a book

Here मैच is a direct object and does not need को.

Using को here would usually sound unnatural in normal Hindi.

Because हारता agrees with a masculine singular subject.

In the present habitual, the verb often agrees with the subject:

• वह हारता है = he loses
• वह हारती है = she loses

Here प्रतिद्वंद्वी is being treated as masculine singular, so we get:

• प्रतिद्वंद्वी मैच हारता है।

If the opponent were female, you would say:

• प्रतिद्वंद्वी मैच हारती है।

If there were multiple opponents:

• प्रतिद्वंद्वी मैच हारते हैं।

हारता है is the present habitual form of हारना (to lose).

It often means:

• loses
• does lose
• tends to lose
• is in the habit of losing

So हारता है does not usually mean is losing right now.

For example:

• वह अक्सर मैच हारता है। = He often loses matches.

In a simple isolated sentence like this, it can also be used in a general or narrative sense: The opponent loses the match.

To say is losing in an ongoing sense, Hindi typically uses a progressive form:

• प्रतिद्वंद्वी मैच हार रहा है। = The opponent is losing the match.

Compare:

• हारता है = loses / usually loses
• हार रहा है = is losing

That distinction is very important in Hindi.

In this sentence, है is part of the verb phrase.

The full form is:

• हारता है

Here:

• हारता = habitual participle-like form
• है = present-tense auxiliary

Together they make the normal present habitual expression.

Without है, the sentence would sound incomplete in standard Hindi unless used in a special style such as headlines, poetry, or very informal speech.

मैच is a very common loanword from English.

Hindi uses many English-origin words in everyday speech, especially for sports, technology, and modern life.

So:

• मैच = match
• टीम = team
• गेम = game
• कोच = coach

Even though it comes from English, it behaves like a normal Hindi noun in sentences.

In this sentence, मैच is understood as singular from meaning and context.

Hindi borrowed nouns like मैच often do not visibly change much in the singular. The sentence means the match, not matches, because the whole sentence describes one event or one generic match.

If you wanted to make plurality clearer, context or number words often help:

• दो मैच = two matches
• कई मैच = many matches

It can cover both ideas depending on context.

• मैच हारना = to lose a match
• युद्ध हारना = to lose a war
• वह हार गया = he lost / he was defeated

So हारना can describe losing a contest, game, fight, election, argument, and so on.

In this sentence, because मैच is the object, the meaning is clearly to lose the match.

Yes. प्रतिद्वंद्वी can refer to:

• an opposing person
• an opposing player
• an opposing team
• a rival competitor in general

So depending on context, this sentence could mean:

• The opponent loses the match
• The rival team loses the match

Hindi often leaves that kind of detail to context.

Possibly, yes. This sentence is correct, but प्रतिद्वंद्वी is a bit formal/literary compared with some everyday alternatives.

In casual speech, people might say:

• विरोधी टीम मैच हारती है। = The opposing team loses the match.
• दूसरी टीम मैच हार जाती है। = The other team ends up losing the match.
• प्रतिद्वंदी मैच हारता है। = a common spelling/pronunciation variant of प्रतिद्वंद्वी

So your sentence is valid, but in conversation people may choose a simpler or more sports-specific noun.

A rough pronunciation is:

prati-dvandvī

A more learner-friendly approximation might be:

pruh-ti-DVUN-dvee

A few notes:

• प्रति sounds like prati
• द्व is a consonant cluster, something like dv
• the final वी is a long ee sound

This is not the easiest Hindi word for beginners because of the consonant clusters, so do not worry if it feels difficult at first.