U.S. Open readies for Serena Williams retirement party | Reuters
For Tennis Stars Lately, It's Toss the Ball, Hit the Ball, Oops! Oops! - The New York Times
Tennis stars' peek-a-boo moments - India Today
We Are Tennis on Twitter: "OOPS! Maria #Sharapova falls in Indian Wells 1st round, stunned by Naomi Osaka 6-4 6-4 #BNPPO18 https://t.co/Jk7s4MuWtC" / Twitter