Henri Kontinen and Christopher Rungkat were the defending champions, but did not compete in the Juniors this year.
Treat Huey and Henri Kontinen were the defending champions, but Huey chose not to participate this year.
 Kontinen played alongside Dominic Inglot and successfully defended the title, defeating Andre Begemann and Leander Paes in the final, 4–6, 6–3, [12–10].
Henri Kontinen (] ; born 19 June 1990) is a Finnish tennis player.
Henri Kontinen and Jarkko Nieminen were the defending champions, but Nieminen chose not to participate this year.
 Kontinen played alongside Robin Haase but lost in the final to Nicolás Almagro and Carlos Berlocq 5–7, 6–3, [11–9].
Karl Thomas Conny Johansson (] ; born 24 March 1975 in Linköping), commonly known as Thomas Johansson, is a retired professional tennis player from Sweden.
 He reached a career-high Association of Tennis Professionals (ATP) world No. 7 singles ranking on May 10, 2002.
 His career highlights in singles include a Grand Slam title at the Australian Open in 2002, and an ATP Masters Series title at the 1999 Canada Masters.
 He also won a silver medal at the 2008 Summer Olympics in men's doubles, partnering Simon Aspelin.
Dominic Inglot and Henri Kontinen were the defending champions, but Kontinen chose not to participate this year.
 Inglot played alongside Daniel Nestor, but lost in the quarterfinals to Roman Jebavý and Matwé Middelkoop.
Christopher Benjamin Rungkat (born 14 January 1990) is an Indonesian tennis player.
 He is the grandson of "Famous" Benny Rungkat, former chairman of the Indonesian Air Carriers Association.
 Christopher's father, Michael Alexander Fritz Rungkat, is of Dutch and Indonesian descent and his mother, Elfia Mirlianti, is full Indonesian descent.
 In 2008, he won the final stage of French Open 2008 Boys' Doubles Juniors category with Finnish tennis player Henri Kontinen.
 He is the youngest ever Indonesian to be the All Indonesian Champion, and by the end of his junior career,he was awarded for Indonesian best promising athlete 2008.
Marin Draganja and Henri Kontinen were the defending champions, but Draganja chose to compete in Bucharest instead.
 Kontinen played alongside John Peers, but lost in the first round to Jamie Murray and Bruno Soares.
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Micke Kontinen (born 18 December 1992) is a Finnish tennis player.
 He is the younger brother of Henri Kontinen who is also a tennis player.
Marin Draganja and Henri Kontinen were the defending champions, but Kontinen chose not to participate.
 Draganja played alongside Julian Knowle, but lost in the quarterfinals to Teymuraz Gabashvili and Nick Kyrgios.
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Question: Henri Kontinen and Thomas Johansson are both professionals in what sport?
Answer: Tennis