Novak Djokovic and Nick Kyrgios were knocked out of the men's doubles in the second round at the Brisbane International after a narrow defeat by top-seeded pairing Nikola Mektic and Michael Venus.
Kyrgios, 29, lost a gruelling three-set match to Giovanni Mpetshi Perricard on Sunday on his return to singles competition after 18 months out through injury.
The Australian said the defeat left him in "throbbing" pain and suggested he was a doubt for this month's Australian Open.
But he fulfilled his promise to play alongside Djokovic in the doubles and appeared comfortable, only occasionally grabbing his right arm between serves.