Jerzy Filip Janowicz Jr. (Polish pronunciation: ; born 13 November 1990) is a professional tennis player from Poland. Born in Łódź, Poland he was introduced to tennis at the age of five by his parents. Known for his very powerful serve, he can hit at up to 249 km/h (155 mph) along with strong groundstrokes. Despite never winning an ATP title, Janowicz obtained a career-high world ranking of no. 14 in August 2013. He was awarded the Gold Cross of Merit by Polish President Bronisław Komorowski in 2013 for his achievements.
Having finished as runner-up at two Junior Grand Slam tournaments, Janowicz rose to prominence on the pro circuit leading up to and following his run to the final, as a qualifier, of the 2012 Paris Masters, during which he defeated five top-20 players such as Andy Murray and Janko Tipsarević. Despite losing to David Ferrer in the finals, he made his top-30 debut in the ATP Rankings and became the highest-ranked male Polish tennis player.