Hi i want to ask you if you could help with this problem :

I have 10 teams and 9 days... each day one team must play one match with another team (not same as already played before/diferent team).

How will look table of matches ? I mean can you write each day which teams will play together ?

I tried many ways but i got bored of thinking ... i cant solve it, so if you can please help me its important for me.

Thanks