Nickname is “Sascha”... Began playing tennis at age 5...Father, Alexander, was a former pro player and is now his coach; mother, Irena, is a tennis coach; brother, Mischa, finished a year-end best No. 51 in 2016. Family moved to Germany in 1991...Speaks German, Russian and English...Idol growing up was Roger Federer. Enjoys watching NBA and favourite sporting personality is Dwyane Wade...Named 2015 ATP Star of Tomorrow presented by Emirates for being the youngest player to finish in the Top 100...Featured in Vogue’s 2015 September issue...Trains in Hamburg and Saddlebrook, Florida...Fitness trainer is Jez Green and physiotherapist is Hugo Gravil.