wta on Twitter: "Kalinskaya is forced to retire due to injury, @SloaneStephens moves into the @WTAGuadalajara final. Final score 3-6, 7-5, ret. #AbiertoAKRON https://t.co/RIgEzZS6QE" / Twitter
US Open Tennis on Twitter: "USA! #Isner advances to his first R16 since 2011. #Vesely retires after two sets 6-3, 6-4 ret. #usopen http://t.co/hikaC25lsq" / Twitter
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Air Force Lt. Col. Dan Oosterhous (Ret.) and Navy Seaman Austin Field (Ret.) (not pictured) compete against the British in the Tennis quarterfinals during the 2016 Invictus Games May 6, 2016 in
ZooTennis: Kalieva One of Four Juniors Reaching ITF Pro Circuit Finals; Three Unseeded Champions at Tennis Europe 14U and 16U Masters Championships; Norrie Advances to BNP Paribas Open Final
![Master Sgt. (Ret.) Andres Rodriguez returns a ball - NARA & DVIDS Public Domain Archive Public Domain Image Master Sgt. (Ret.) Andres Rodriguez returns a ball - NARA & DVIDS Public Domain Archive Public Domain Image](https://cdn2.picryl.com/photo/2019/06/23/master-sgt-ret-andres-rodriguez-returns-a-ball-943e8b-1024.jpg)
Master Sgt. (Ret.) Andres Rodriguez returns a ball - NARA & DVIDS Public Domain Archive Public Domain Image
![September 5,2016: Juan Martin Del Potro (ARG) defeated Dominic Thiem (AUT) 6-3, 3-2 (ret), at the US Open being played at Billie Jean King National Tennis Center in Flushing, Queens, NY. (Cal September 5,2016: Juan Martin Del Potro (ARG) defeated Dominic Thiem (AUT) 6-3, 3-2 (ret), at the US Open being played at Billie Jean King National Tennis Center in Flushing, Queens, NY. (Cal](https://c8.alamy.com/comp/2P10HTY/september-52016-juan-martin-del-potro-arg-defeated-dominic-thiem-aut-6-3-3-2-ret-at-the-us-open-being-played-at-billie-jean-king-national-tennis-center-in-flushing-queens-ny-cal-sport-media-via-ap-images-2P10HTY.jpg)