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Tommy Haas is 35 years old and ranked No. 12
Last year, 19-year-old Sloane Stephens became a major story at the Australian Open, as she upset Serena Williams to reach the semifinals. Don't expect teenagers to get much attention at this year's Australian Open, though, as older players continue to dominate the sport.
It's more likely that an aging veteran like 33-year-old Venus Williams or 35-year-old Tommy Haas will be the story in Melbourne later this month.
Limited by ailments and injuries, Williams is the No. 47-ranked player at the moment. But she has shown signs lately that she can still compete with the best. She beat No. 14-ranked Kirsten Flipkens at the U.S. Open and knocked off No. 2 Victoria Azarenka in Japan in September. Williams has reached the semifinals of this week's tuneup event in Auckland, New Zealand.
Haas twice missed more than a year of action because of injuries, but is back up to No. 12 in the rankings. He has reached the Australian Open semifinals three times, though not since 2007.
Jelena Jankovic, who turns 29 next month, is another veteran who could pull off a surprise. Ranked No. 1 at the end of 2008, Jankovic has found her touch again and is up to No. 8 in the rankings after dropping out of the top 30 in 2012. She is into the semifinals in this week's event in Brisbane.
Older players are dominating both the men's and women's tour in general. Serena Williams, 32, has a shot at becoming oldest player to complete a single-year Grand Slam, and the No. 3 players on the men's and women's side (Li Na and David Ferrer) are both 31.
The 20-year-old Stephens is the only woman in the top 30 under age 22. Five members of the women's top 20 will be 30 by end of 2014, and the highest ranking teenager (No. 32 Eugenie Bouchard) turns 20 next month.
Juan Martin del Porto is the youngest member of the men's top 10 at age 25, and no one in the top 50 is younger than 22. Three of the top 12 male players and 10 of the top 30 are 30 years old or older.
Ashleigh Barty and Nick Kyrgios, two Australian teenagers who figured to draw attention at the Australian Open, are battling injuries.
Maturity, not youth, is the storyline at the Australian Open.