Sporting events have played a significant role to ease this tension.
When you get to the end of that first paragraph and make your point, I think you should use a longer, more meaningful sentence that expresses your main message to the reader a little more clearly.
Do the quote like this:
"There is no such thing as public opinion. T
here is only published opinion."
International events in the field of sports also help
to renew bilateral ties between nations that are supposedly foes.
I think the word require will be good here:
But these sporting events
require a lot of investment, which is not easy for any country.
Do not use although and also yet. Just use one or the other:
They are not a complete solution to the tension, yet they have a significant effect.
Although they are not a complete solution to the tension, they have a significant effect.