![Leonardo Mayer of Argentina returns the ball to Jan-Lennard Struff of Germany during the men's singles first round match at the Wimbledon Tennis Championships in London, Monday July 2, 2018. (AP Photo/Kirsty Leonardo Mayer of Argentina returns the ball to Jan-Lennard Struff of Germany during the men's singles first round match at the Wimbledon Tennis Championships in London, Monday July 2, 2018. (AP Photo/Kirsty](https://c8.alamy.com/comp/2MN2ND6/leonardo-mayer-of-argentina-returns-the-ball-to-jan-lennard-struff-of-germany-during-the-mens-singles-first-round-match-at-the-wimbledon-tennis-championships-in-london-monday-july-2-2018-ap-photokirsty-wigglesworth-2MN2ND6.jpg)
Leonardo Mayer of Argentina returns the ball to Jan-Lennard Struff of Germany during the men's singles first round match at the Wimbledon Tennis Championships in London, Monday July 2, 2018. (AP Photo/Kirsty
![Frances Tiafoe of the USA celebrates winning his singles tennis match against Leonardo Mayer of Argentina at the Queen's Club tennis tournament in London, Wednesday, June 20, 2018. (AP Photo/Kirsty Wigglesworth Stock Frances Tiafoe of the USA celebrates winning his singles tennis match against Leonardo Mayer of Argentina at the Queen's Club tennis tournament in London, Wednesday, June 20, 2018. (AP Photo/Kirsty Wigglesworth Stock](https://c8.alamy.com/comp/2MN4X65/frances-tiafoe-of-the-usa-celebrates-winning-his-singles-tennis-match-against-leonardo-mayer-of-argentina-at-the-queens-club-tennis-tournament-in-london-wednesday-june-20-2018-ap-photokirsty-wigglesworth-2MN4X65.jpg)
Frances Tiafoe of the USA celebrates winning his singles tennis match against Leonardo Mayer of Argentina at the Queen's Club tennis tournament in London, Wednesday, June 20, 2018. (AP Photo/Kirsty Wigglesworth Stock
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