After skipping the Middle East swing, Sharapova announced in February that she underwent “a small procedure” on her right shoulder that left her out of Indian Wells and Miami.
“As many of you know, I have struggled with shoulder pain since last summer,” she said. “For ten weeks post US Open, I focused on getting my rotator cuff and scapula strong to support a surgically repaired fraying tendon and a small labrum tear. Although my shoulder got strong, it didn’t help the pain on impact.
“After a few different opinions in a few different countries, last week I had a small procedure done which will take a few weeks to heal.
“Although this has been a very long process, I am incredibly committed to getting back strong and more importantly without the pain I was playing with at the beginning of the year.”
Sharapova’s next scheduled tournament is the Mutua Madrid Open, a Premier Mandatory event which begins on May 5.
Other withdrawals from Stuttgart include Elina Svitolina, Sloane Stephens, Danielle Collins and Dominika Cibulkova.