CASEY Dellacqua's title rivals should be worried.
After advancing to the second round of the William Loud Bendigo International, Delllacqua believes there's still room for improvement.
The Perth star ground out a 6-4 6-3 first round victory over the Czech Republic's Petra Krejsova on Wednesday.
"It was good just to get through that first one, I didn't expect to come out feeling like I was playing amazing or my best tennis," Dellacqua said.
"So it was good just to battle through that one and I did what I needed to do to get the win.
"It's good to have some court time and, hopefully, as the week and the next week progresses I'll just improve."
The 2011 Bendigo International winner has recently returned to Australia after partnering-up with Ashleigh Barty to reach the doubles final of last month's US Open.
Dellacqua's Grand Slam singles campaign ended in the first round and she's keen to sharpen her game during the next fortnight in Bendigo.
"My doubles ranking has skyrocketed and my singles has lagged a bit, so that's why I came here, to play as many singles matches as I could," she said.
The 28-year-old left-hander will most likely face Isabella Holland - who she beat in the 2011 final - in the second round.