user: Question: Which Total matches is the highest one that has Points % of 70%?
Columns: ['Year', 'Total matches', 'Total W-L-H', 'Singles W-L-H', 'Points won', 'Points %']
Types: ['text', 'real', 'text', 'text', 'real', 'text']
Sample row: ['Career', 46.0, '22-18-6', '5-5-2', 25.0, '54.35%']
SQL:

assistant: SELECT MAX("Total matches") FROM "Table" WHERE "Points %" = '70%';