user: Question: Which Matches has champion Rank of 5?
Columns: ['Rank', 'Matches as champion', 'Reigns as champion', 'Title matches won*', 'Title last held']
Types: ['real', 'real', 'real', 'real', 'text']
Sample row: [1.0, 103.0, 20.0, 86.0, '28 March 2007']
SQL:

assistant: SELECT "Matches as champion" FROM "Table" WHERE "Rank" = 5.0;