Table: tennystats
Columns: result
no
date
category
tournament
surface
opponent
score

Question: How many different results were there for the scores 6–7 (2–7) , 6–2, 7–6 (7–3)?
SQL: SELECT COUNT("result") FROM tennystats WHERE "score" = '6–7 (2–7) , 6–2, 7–6 (7–3)'