Everyone has been congratulating Lucie Safarova on her ascent to doubles No.1 - but the sweetest reward of all came from her two small nieces.
They baked a special cake to mark her achievement - and Aunt Lucie was thrilled, sharing a snapshot of the three of them on social media.
Safarova's nieces aren't the only ones wanting a photo with the new doubles World No.1 - Barbora Strycova, partnering her in the absence of Bethanie Mattek-Sands, grabbed a locker-room selfie with her in Cincinnati last week.
Long-time friend Anastasia Pavlyuchenkova, who's won two titles with Safarova as a doubles partner, posted some snaps from her own archive to social media.
Hear more from the new WTA Doubles No.1 on the WTA Insider Podcast: