Jeśli przegramy ten mecz, nie będziemy mieć szansy na medal w tym turnieju.

Because this sentence talks about a future possibility: if we lose.

• przegramy = we will lose
• przegraliśmy = we lost

In Polish, after jeśli when you mean a future condition, you normally use a future form, unlike English, which usually uses the present: If we lose...

So Polish says:

• Jeśli przegramy ten mecz... = If we lose / If we are going to lose this match...

Even though English uses present after if, Polish often uses the future here.

Przegramy is:

• 1st person plural = we
• future tense
• from the verb przegrać = to lose

So przegramy literally means we will lose.

This verb is perfective, which is why its simple form can refer to the future. In Polish, perfective verbs do not have a normal present tense in the same way imperfective verbs do; forms like przegram / przegramy usually have future meaning.

Because mieć is an imperfective verb, and imperfective verbs form the future with:

• będę / będziesz / będzie / będziemy / będziecie / będą
• plus an infinitive or sometimes a past-like personal form

So:

• będziemy mieć = we will have
• also possible: będziemy mieli = we will have

Both are correct. In this sentence, nie będziemy mieć means we will not have.

You can say both:

• nie będziemy mieć szansy
• nie będziemy mieli szansy

Both mean we will not have a chance.

The version with the infinitive (mieć) is fully correct. The version with the -li form (mieli) is also very common in everyday Polish. A learner should recognize both.

Because of negation.

The verb mieć normally takes the accusative:

• Mamy szansę. = We have a chance.

But when the sentence is negative, Polish very often changes that object into the genitive:

• Nie mamy szansy. = We do not have a chance.

That is exactly what happens here:

• nie będziemy mieć szansy

So szansy is genitive singular of szansa.

Because the expression is mieć szansę na + accusative, meaning to have a chance at / a chance for something.

So:

• szansa na medal = a chance for a medal
• mieć szansę na medal = to have a chance at a medal

Here medal is in the accusative, but for this masculine inanimate noun, the accusative looks the same as the nominative:

• nominative: medal
• accusative: medal

So the form does not change visibly.

It is the object, and it is in the accusative. The reason it looks unchanged is that for many masculine inanimate nouns, the accusative is the same as the nominative.

So:

• nominative: ten mecz = this match
• accusative: ten mecz = this match

In the sentence:

• przegramy ten mecz = we will lose this match

the phrase is in the accusative, even though it looks the same as the dictionary form.

Because after w meaning in, Polish uses the locative case.

• ten turniej = this tournament (nominative)
• w tym turnieju = in this tournament (locative)

So:

• w tym turnieju = in this tournament

This is a very common pattern:

• w domu = in the house / at home
• w szkole = at school
• w mieście = in the city

They both mean this, but they match different nouns and cases.

• ten mecz = this match
• w tym turnieju = in this tournament

Why different forms?

Because Polish words like this change depending on:

• gender
• number
• case

Here:

• mecz is masculine singular, accusative form looks like ten mecz
• turniej after w must be in the locative, so ten changes to tym

So ten and tym are different forms of the same demonstrative word.

Because the sentence begins with a conditional clause:

• Jeśli przegramy ten mecz, ...

In Polish, a clause introduced by jeśli is normally separated by a comma from the main clause.

So the structure is:

• Jeśli X, Y.
• If X, Y.

This comma is standard and important in written Polish.

Yes. Jeśli and jeżeli both mean if.

So you could also say:

• Jeżeli przegramy ten mecz, nie będziemy mieć szansy na medal w tym turnieju.

In most situations, they mean the same thing. Jeżeli can sound slightly more formal or careful, but both are very common and correct.

Because Polish and English handle future conditions differently.

In English, after if, we usually use the present tense for future meaning:

• If we lose, we won’t have a chance.

In Polish, it is normal to use a future form after jeśli when the meaning is future:

• Jeśli przegramy, nie będziemy mieć...

So even though the English translation uses lose, the Polish verb przegramy is actually future in form.

They are similar, but not exactly identical in style.

• szansa na medal = a chance for a medal
• szansa zdobycia medalu = a chance to win a medal / a chance of winning a medal

The version in your sentence, szansy na medal, is very natural and common in sports contexts. It sounds like a realistic possibility of ending up with a medal.

It has two main parts:

1. Jeśli przegramy ten mecz
   = If we lose this match

2. nie będziemy mieć szansy na medal w tym turnieju
   = we will not have a chance for a medal in this tournament

So the pattern is:

• Jeśli + condition, result

This is one of the most common conditional sentence patterns in Polish.