After a tie-break, how is it decided which end to start serving from in the following set?
Do players get a choice or do they keep the current end for one game or swap immediately?
According to the rules you change ends on every odd game.
So at the end of a Tie-break, they need to swap ends since the score will be 7-6. It does not matter where they started the game, just at the end of the game. It may seem strange since players swap after every 6 points in a tie break.
Also who ever started serving the tie-break will then receive the first game of the next set
I asked this to a national referee of my country (we played at the same tennis club) and he said you just need to swap ends at the end of the game. So whatever side you were on at the end of the game, swap ends