Venus Williams: Serena and I "inspire each other" to success

Venus Williams has revealed that she and her sister Serena enjoy a friendly rivalry after the duo booked their places for a showdown in the quarter-finals of the US Open.

The 35-year-old eased past Anett Kontaveit in straight sets, while Serena defeated Madison Keys to reach the last eight of the competition, where the sisters will face off for a semi-final berth.

"It's been awesome," Venus told ESPN. "I'm so proud of Serena, and I think she's proud of me. We inspire each other."

Venus and Serena have played each other 26 times, with the 21-time Grand Slam champion edging the head-to-head battle with 15 wins compared to Venus's 11.