Australian Open 2021
- No 10 seed taken to first-set tie-break by Anastasia Potapova
- Concern for Ash Barty after world No 1 pulls out of doubles
Australian Associated Press
Fri 12 Feb 2021 04.27 GMT
Serena Williams overcame a shaky start to book an Australian Open fourth-round berth at Melbourne Park, while Ash Barty withdrew from the doubles competition amid concerns the world No 1s thigh strain is more serious than she is letting on.
Seven-times champion Williams had to recover from 5-3 down and…