Ivanovic won her first grand slam title in Paris on Saturday
Ana Ivanovic suffered a setback in her preparations for Wimbledon after she withdrew from next week's International Women's Open in Eastbourne.
The newly crowned world number one is suffering from a muscle injury, but also admitted to needing a break after winning the French Open last Saturday.
"I have a problem with my abductor," said the 20-year-old Serbian.
"I am also mentally exhausted - I am not ready to compete so soon after winning my first Grand Slam."
She added: "I'm very sorry to anyone who was hoping to see me play in Eastbourne.
"I've heard great things about the tournament and I was looking forward to going there, spending some time near the sea, and preparing for Wimbledon."
Ivanovic overtook Maria Sharapova as world number one with her victory over Dinara Safina at Roland Garros.
Meanwhile, last year's runner-up at Wimbledon, Marion Bartoli, aggravated a wrist injury making her a doubt for Eastbourne.
She suffered towards the end of her defeat to Petra Cetkovska at the DFS Classic in Birmingham losing 5-7 6-4 6-0 to the Czech player.
"It seems like 2008 doesn't want me to be in great shape," said Bartoli afterwards.
"I am always having illness or injury. There is always something in my body and it's hard to compete at the best level."
The Eastbourne event, which begins on 14 June, will feature former world number one Lindsay Davenport and 2006 Wimbledon champion Amelie Mauresmo.