![Australia's Carsten Ball celebrates defeating Argentina's Leonardo Mayer in their semi-final match at the L.A. Tennis Open tournament in Los Angeles, California, August 1, 2009. REUTERS/Danny Moloshok (UNITED STATES SPORT TENNIS Stock Australia's Carsten Ball celebrates defeating Argentina's Leonardo Mayer in their semi-final match at the L.A. Tennis Open tournament in Los Angeles, California, August 1, 2009. REUTERS/Danny Moloshok (UNITED STATES SPORT TENNIS Stock](https://c8.alamy.com/comp/2E8DM0T/australias-carsten-ball-celebrates-defeating-argentinas-leonardo-mayer-in-their-semi-final-match-at-the-la-tennis-open-tournament-in-los-angeles-california-august-1-2009-reutersdanny-moloshok-united-states-sport-tennis-2E8DM0T.jpg)
Australia's Carsten Ball celebrates defeating Argentina's Leonardo Mayer in their semi-final match at the L.A. Tennis Open tournament in Los Angeles, California, August 1, 2009. REUTERS/Danny Moloshok (UNITED STATES SPORT TENNIS Stock
![Roger Federer rushes to Leonardo Mayer win after Cincinnati Masters schedule nightmare | Tennis | Sport | Express.co.uk Roger Federer rushes to Leonardo Mayer win after Cincinnati Masters schedule nightmare | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/Roger-Federer-Cincinnati-Masters-1004928.jpg?r=1534534198925)
Roger Federer rushes to Leonardo Mayer win after Cincinnati Masters schedule nightmare | Tennis | Sport | Express.co.uk
![File:2017 US Open Tennis - Qualifying Rounds - Maximilian Marterer (GER) def. Leonardo Mayer (ARG) (36724445722).jpg - Wikimedia Commons File:2017 US Open Tennis - Qualifying Rounds - Maximilian Marterer (GER) def. Leonardo Mayer (ARG) (36724445722).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/5/58/2017_US_Open_Tennis_-_Qualifying_Rounds_-_Maximilian_Marterer_%28GER%29_def._Leonardo_Mayer_%28ARG%29_%2836724445722%29.jpg)