Nick Kyrgios shuts down Ally Langdon's question about being secretly engaged

Nick Kyrgios declares that girlfriend Costeen Hatzi 'is definitely the one'

Nick Kyrgios buys $1.6MILLION penthouse in Sydney's Kensington to be with girlfriend Costeen Hatzi

Nick Kyrgios and his girlfriend Costeen Hatzi look glum as they head out for coffee in Sydney