The robbers shattered the armored glass case in which the racquet was kept and fled the scene without activating the alarm.
Employees who discovered the broken case on Tuesday said those who broke into the facility apparently knew what they were looking for, as no other piece of equipment was taken.
On the display case in which the racquet was kept, a plaque was affixed saying that the racquet is a memorial to the late prime minister.
Rabin was an avid tennis player and practiced mainly at the center in Ramat Hasharon. The racquet was donated to the center by Rabin’s late wife Leah after his assassination.
“I’m shocked; this was a vile act,” tennis center director Janine Strauss said. “Yitzhak and Leah contributed a lot to the center.”
Strauss said she spoke on the phone with Rabin’s daughter, Daliah Rabin Philosoph.
“We both ask that whoever stole the racquet return it,” she said.
The police said an investigation into the incident has been launched but there are no suspects as of yet.