Caroline Wozniacki said she "just has to move on" after losing her first match since the end of her engagement to golfer Rory McIlroy.
Wozniacki, 23, was beaten 7-6 (7-5) 4-6 6-2 by Belgium's Yanina Wickmayer in the first round of the French Open.
The former world number one said the break-up "came as a bit of a shock".
The 13th seed added: "I just tried to prepare the best that I could and really tried to focus on my match and what I had to do out there."
McIlroy, 25, and Wozniacki ended their engagement last Wednesday.
Just days later, McIlroy won the PGA Championship at Wentworth.
Wozniacki, a quarter-finalist in Paris in 2010, added: "I want to thank everybody for their support and sweet messages. That's really nice.
"What happens in my personal life, I just want to really keep that between my closest people around me. I just have to move on."
The Dane added that she was not at full fitness following a knee injury and was unsure of her exact plans in the weeks ahead.
"I haven't really thought about it," she said. "I was just so focused on one day at a time and one hour at a time. I haven't really thought forward.
"I need to sit down and think about how I can get my knee 100% ready.
"I want to prepare for Wimbledon, which is a big tournament and a better surface for me."
Her next event is the grass-court tournament at Eastbourne in June.