Domestically they hold the best record of five titles in a row , having won the Portuguese Liga 24 times , the Portuguese Cup 17 times and Portuguese Supercup 19 times and 1 Liga intercalar of Portugal ( 61 national titles ) , and also : Domestically they hold the best record of five titles in a row , having won the Portuguese Liga 24 times . Other titles won by the club include the Portuguese Cup 15 times and Portuguese Supercup 17 times ( 51 national titles ) .