Fancy dress, trick-or-treating, pumpkin-carving - the stars of the WTA threw themselves into Halloween with aplomb.
New mom Serena Williams took the opportunity to dress up daughter Alexis as Batman.
Shelby Rogers dressed as Tinkerbell.
Aleksandra Wozniack opted to dress as Minnie Mouse as she celebrated with her twin nieces.
Eugenie Bouchard and her friends decided to dress down - as the Baywatch crew.
Naomi Broady and her family tried out a spot of traditional pumpkin carving.
And Samantha Crawford made sure her dog was suitably attired for the festivities.
Not everyone had spectacular - or spooktacular - plans for Halloween, though.