British tennis star Laura Robson didn't waste any time beating American Ester Goldfeld in the Australian Open girls' singles.
It only took her 43 minutes to win her place in the semis.
The 16-year-old Briton, who lost in the quarter-finals of the women's doubles on Wednesday, thrashed out a 6-1 6-0 win.
Last year Laura Robson made it to the girls' finals, but lost to Russia's Ksenia Pervak.
Her victory in the quarters was even more impressive considering she'd only got to bed at 1am the night before!
She'd been playing in the girls' doubles with Sally Peers, but she reckoned that the lack of sleep actually helped her concentrate.
"One of the reasons I played well is that I knew I was tired from last night and I had to be extra focused," she said.