“It's just a weakness for me. I know I need to take care of it well.
“I need to let the back rest. [It] It needs appropriate management and accuracy. “
Raducanu chose to play in Berlin instead of Nottingham after showing it on the WildCard card for WTA 500, which starts on Monday, and is scheduled to display nine of the 10 best players in the world.
Katie Polater will jump when WTA classifications are updated.
Estborn is held from 23 to 28 June and Wimbledon begins on June 30.
Radokano beat Jessica Bigula in Estborn last year to demand her first victory over the best 10 players, before arriving in the fourth round in Wimbledon.
