It took Barty less than an hour to defeat British wildcard Katie Boulter in straight sets 6-0 6-2, hitting 11 aces.

She only lost only 11 points on serve in the match.

The world No.17 now plays Japan’s Naomi Osaka in the semifinals.

They two have met previously this year with the No.18-ranked Osaka winning their third round meeting at this year's Australian Open.

“We had a great match at the Australian Open this year where she got the better of me,” Barty told tennis.com.au.

“She’s a very big, powerful player with a great serve and a great first ball behind her serve.

“I think I’m going to have to use a lot of variety to try and extend those points and get into the points.”

Fellow Australian Anja Tomljanović is out of the Rosmalen Grass Court Championships after going down to Aryna Sabalenka 3-6 7-5 6-0.

The match was suspended due to rain on Thursday with play continuing on Friday.