What does 7 6 7 mean in tennis scoring?

Answer 1

the first two numbers show that the set was decided by a tie break, as its only in a tie break that the game tally can be 7-6. The last number shows you the number of points that the person who lost the set got in that tie break, in this case, is 7. This tells you that the person who won the set got 2 more points in the tie break, i.e. 9. So 7-6 (13) means it went all the way to 15-13 in the tie break.