Tristan Thompson is having no problem finding companionship on his trip to Greece ... a getaway on the heels of news he and Khloe Kardashian are expecting a baby together via surrogate.
TT -- decked out in a floral-pattern shirt -- was spotted walking hand in hand through the streets of Mykonos with a mystery woman around 5 AM Sunday morning. Tristan had previously been partying at a club called Bonbonniere ... so it's possible he met her while out.
It's not the first time we've seen the NBA player out partying 'til the late hours of the night overseas .