Alja Tomljanovic plans to switch nationalities and will represent Australia at the U.S. Open, reports the Melbourne Age.

The 21-year-old Croatian, who has been training in the United States since she was a teenager, appears to have decided to move to Australia after working with Australian coach David Taylor since December. Following a bout with mononucleosis, the former top junior has now reached the Top 60 and defeated Agnieszka Radwanska at the French Open.

"Tennis Australia welcomes Ajla to the Australian tennis family," the association said in a statement.

Tomljanovic can being representing Australia in ITF and Grand Slam competition, but will not be able to play for Australia on the WTA tour until she is a citizen. Tomjanovic joins Jarmila Gajdosova and Anastasia Rodionova as among other WTA players who have switched nationalities to play for Australia.