FILE -Sergiy Stakhovsky from Ukraine returns the ball to Stan Wawrinka from Switzerland during a second day match of the Dubai Tennis Championships in Dubai, United Arab Emirates, Tuesday, Feb. 23, 2016. About 1 1/2 months after the last match of Sergiy Stakhovsky’s professional tennis career, the 36-year-old Ukrainian left his wife and three young children in Hungary and went back to his birthplace to help however he could during Russia’s invasion. (AP Photo/Kamran Jebreili, File)