It all went down at the fancy Castiglion del Bosco Hotel in Tuscany -- the same place where Justin Verlander wife'd up Kate Upton in 2017.
The guest list for the Wozniacki/Lee bash was pretty amazing -- Serena was a bridesmaid and her husband Alexis Ohanian was there.
Best weekend of my life u2764ufe0f pic.twitter.com/4RcowKAIGb
— Caroline Wozniacki (@CaroWozniacki) June 16, 2019
Other huge stars on the guest list ... NBA stars like Pau Gasol and Harrison Barnes. Ex-NFL quarterback Jesse Palmer and tennis stars Angelique Kerber, Agnieszka Radwau0144ska and Urszula Radwau0144ska.