User:Kompik/sports/tennis/juniors

Players who played both in the MD both in junior and senior events at the same Grand Slam tournament
The list is definitely not complete, just some random names I was able to find. Since Wikipedia does not have draw sheets for junior competitions before 2006, it is difficult to find older occurrences.

1980s

 * Stefan Edberg won junior singles competition at all four Grand Slam tournaments in 1983. In the same year he also played in senior competition at US Open, Wimbledon and Australian Open.
 * Johan Anderson the winner of boys' singles at 1988 Australian Open, played also mens' singles at the same tournament (wild card).
 * Fabrice Santoro won boys' singles at 1989 French Open. He also competed in men's singles at the same tournament. However, much more notable achievement by a junior player at that tournament was that 17 years-old Michael Chang won senior competition and become the youngest ever Grand Slam champion.

1990s

 * Chanda Rubin won girls' singles at 1992 Wimbledon Championships. She also competed in women's singles.

2005

 * Donald Young entered both men's singles (wild card) and boys' singles (top seed) at US Open.

2006

 * Alizé Cornet played both Women's Singles (wild card) and Girls' Singles (15th seed) at Australian Open.
 * Youlia Fedossova played both Women's Singles (wild card) and Girls' Singles (4th seed) at French Open.
 * Naomi Cavaday competed in women's singles (wild card) and girls' singles at Wimbledon.
 * Donald Young played both men's singles (wild card) and boys' singles at US Open.

2007

 * Madison Brengle played both women's singles (wild card) and girls' singles at Australian Open.
 * Alizé Cornet won girl's singles at French Open. She competed also in women's singles (wild card).
 * Anastasia Pavlyuchenkova and Naomi Cavaday competed in both girls' singles and women's singles at Wimbledon. (They received wild cards into the main draw.)
 * Lauren Albanese, Jessica Moore and Ashley Weinhold competed both in women's singles (wild cards) and girls' singles at 2007 US Open.

2008

 * Coco Vandeweghe received wild card into women's singles at US Open but lost in the first round. She also received wild card into girls' singles competition and she won the junior tournament.

2009

 * Bernard Tomic played both men's singles and boys' singles (2nd seed) at French Open.
 * Laura Robson received wild card into main draw at Wimbledon. She also entered girls' singles competition, where she was the defending champion, but lost in the third round.

2010

 * Jack Sock received wild card into men's singles where he lost in the first round. He won boys' singles at the same tournament.

2011

 * Madison Keys played both women's singles (wild card, reached second round) and girls' singles at US Open.

2013

 * Nick Kyrgios played both men's singles (wild card, reached second round) and boys' singles (top seed) at French Open.

2014

 * Fiona Ferro played both women's singles (wild card) and girls' singles at French Open.
 * CiCi Bellis played women's singles at 2014 US Open (wild card). She upset 12th seed Dominika Cibulková in the first round. After losing her second round match, she also competed in girl's singles.

2015

 * Fiona Ferro played both women's singles (wild card) and girls' singles at French Open.
 * At US Open, Tommy Paul qualified to the main draw where he lost in the first round. Then he played in boys' singles competition. He lost in the final to Taylor Harry Fritz.
 * Sofia Kenin received wild card into main draw of US Open. After losing in the first round, she played also girls' singles. She lost in the final to Dalma Gálfi.

2016

 * Maddison Inglis played both women's singles (wild card) and girls' singles at Australian Open.