us open

Serena Williams progresses to US Open quarterfinals

Serena Williams insists her desire to win is "still incredibly high" after becoming a mom as she came through a tough test against the hard-hitting Kaia Kanepi to progress to the quarterfinals of the US Open.

Nick Kyrgios' US Open win criticized after 'pep talk'

The career of Nick Kyrgios -- who has been criticized for his attitude and on-court behavior in the past -- is under renewed scrutiny after the Australian tennis star received a "pep talk" from the umpire during his match against Pierre-Hugues Herbert at the U.S. Open on Thursday.