As the current number-one ranked tennis player in the world, Serbian star Novak Djokovic has been off the market since his career took off in 2005, dating girlfriend Jelena Ristic.

Ristic and Djokovic, who have been dating for more than five years, met through, you guessed it, tennis. The couple reportedly met through mutual friends in Serbia, according to the Wide World of Sports.

While not much is known about her aside from her studies in finance in Milan, Ristic seems to be Djokovic's biggest fan, attending all of his games, including his win in the Wimbledon 2011 final.

In a video clip for the ATP World Tour, Jelena Ristic was photographed with Djokovic and paused to comment on her boyfriend's success.

I'm really proud. It's his dream to be so successful and I'm really happy for him that he managed to, you know, accomplish at least part of his dream, Ristic said. Hopefully I'll be there to help him and to see him achieving the biggest one, the top.

Related: Jelena Ristic: Novak Djokovic Posts Fat Pictures of Girlfriend Before Australian Open [PHOTOS]

Jelena Ristic Novak Djokovic
Djokovic has been dating the lovely Ristic for five years, and she has shown up to many of his tournaments. unitedartist.byethost13.com
Jelena Ristic Djokovic
Jelena Ristic and Novak Djokovic have been dating for five years. She is often seen at his matches. Reuters
Jelena Ristic, the girlfiend of Novak Djokovic of Serbia, sits on Centre Court
Jelena Ristic, the girlfiend of Novak Djokovic of Serbia, sits on Centre Court for Djokovic's men's singles final match against Rafael Nadal of Spain at the Wimbledon tennis championships in London July 3, 2011. REUTERS
Tennis player Djokovic and girlfriend Ristic arrive on the red carpet for the screening of the film The Beaver at the 64th Cannes Film Festival
Serbian tennis player Novak Djokovic and his girlfriend Jelena Ristic arrive on the red carpet for the screening of the film "The Beaver" at the 64th Cannes Film Festival, May 17, 2011. Reuters
Ristic follows Djokovic039s match against Switzerland039s Stanislas Wawrinka at the Swiss Indoors in Basel
Serbia's tennis player Novak Djokovic's girlfriend Jelena Ristic follows Djokovic's match against Switzerland's Stanislas Wawrinka at the Swiss Indoors ATP tennis tournament in Basel November 6, 2009. Reuters
Jelena Ristic, the girlfiend of Novak Djokovic of Serbia
Jelena Ristic, the girlfiend of Novak Djokovic of Serbia REUTERS/Eddie Keogh
Novak Djokovic and his girlfriend Jelena Ristic
Serbia's tennis player Novak Djokovic and his girlfriend Jelena Ristic kiss as they arrive on the red carpet for the screening of the film "The Beaver" at the 64th Cannes Film Festival, May 17, 2011. REUTERS