Originally posted on FOX Sports  |  Last updated 4/25/12

MELBOURNE, AUSTRALIA - JANUARY 27: Victoria Azarenka of Belarus plays a backhand in her quarterfinal match against Serena Williams of the United States of America during day ten of the 2010 Australian Open at Melbourne Park on January 27, 2010 in Melbourne, Australia. (Photo by Mark Kolbe/Getty Images)
Top-ranked Victoria Azarenka of Belarus advanced to the Porsche Grand Prix quarterfinals when Andrea Petkovic was forced to retire after injuring her right ankle on Thursday. Azarenka was leading 6-2, 4-4 when the German stepped awkwardly and twisted her right ankle on the indoor red clay court. Petkovic didn't even try to continue playing and had to be helped off the court. Ranked No. 11 in the world, Petkovic was in the second match of her comeback after injuring her lower back in January. Petkovic was the first German woman to finish a year in the top 10 since Steffi Graf in 1998. Angelique Kerber of Germany routed sixth-seeded Caroline Wozniacki of Denmark 6-1, 6-2. Kerber also beat the former world No. 1 to win the title in Copehnagen this month. Wild card Mona Barthel of Germany used her big serve to upset seventh-seeded Marion Bartoli of France 6-3, 6-1 for a place in the last eight. Barthel has jumped from No. 196 to 35 in the past year. She had seven aces against Barto...
MORE FROM YARDBARKER:
Is Serena Williams the most important modern athlete?
GET THE YARDBARKER APP:
Ios_download En_app_rgb_wo_45
MORE FROM YARDBARKER

Everything you need to know for CFB Championship Week

Steve Kerr admits using marijuana to treat chronic back pain

WATCH: Huskies, Buffaloes go back-to-back with amazing plays

Rolando McClain suspended indefinitely by NFL

Helfrich, Kelly spoke about possibility of Kelly returning to Oregon

LIKE WHAT YOU SEE?
GET THE DAILY NEWSLETTER:

Paul Maurice: Game plans won’t work trying to stop McDavid

Report: Nats considering Ian Desmond reunion

Eric Dickerson: Rams would be better off without Jeff Fisher

Sheriff: Joe McKnight shooting suspect fired from inside car

Revis insists he has 'a lot' of football left, still loves game

Report: Siemian misses practice Friday, Lynch likely to start

Best of Yardbarker: CFB Championship Week chaos

Five teams on upset alert in NFL Week 13

Sporting life: Gifts for real fans (that aren't ugly NFL sweaters)

New faces help Spurs continue unparalleled success

The Pirates prepare for rarely chartered waters in dealing Andrew McCutchen

The 10 best sports docs available for streaming

Box Score 12/2: High-kicking it into the weekend

Jeff Fisher is the unkillable cockroach of NFL head coaches

Four teams to keep an eye on at the 2017 Winter Meetings

Eugene Monroe opens up about NFL’s drug policy

Ideal MLB offseason blueprint for every team

Eight NFL teams facing must-win games in Week 13

Tennis News
Delivered to your inbox
You'll also receive Yardbarker's daily Top 10, featuring the best sports stories from around the web. Customize your newsletter to get articles on your favorite sports and teams. And the best part? It's free!

By clicking "Sign Me Up", you have read and agreed to the Fox Sports Digital Privacy Policy and Terms of Use. You can opt out at any time. For more information, please see our Privacy Policy.
the YARDBARKER app
Get it now!
Ios_download En_app_rgb_wo_45

Sporting life: Gifts for real fans (that aren't ugly NFL Christmas sweaters)

New faces help Spurs continue unparalleled success

The Pirates prepare for rarely chartered waters in dealing Andrew McCutchen

The 10 best sports docs available for streaming

Everything you need to know for CFB Championship Week

Jeff Fisher is the unkillable cockroach of NFL head coaches

Four teams to keep an eye on at the 2017 Winter Meetings

Porzingis reshapes Knicks by elevating his game

TailGreater: Your championship week playlist is set

Clarification: Why the rules near the crease need to be fixed

Today's Best Stuff
For Publishers
Company Info
Help
Follow Yardbarker