what wins on Sunday sells on Monday saying2 •(US) A brand of automobile that performs well in racing competitions will be popular with retail purchasers."The automakers have provided a lot of money and support for NASCAR," Baker said. "They believe that what wins on Sunday sells on Monday." — 2008 •(US) Any equipment available to consumers that performs well in widely-viewed public events on weekends can be expected to receive higher retail sales subsequently.There's an old saying in the golf industry: What wins on Sunday sells on Monday. Golfers are the ultimate copycats. — 2006
