Rafael Nadal suffered a doubles defeat as the 22-time grand slam champion returned after nearly a year on the sidelines.
The Spaniard has been out since suffering a hip injury during a second-round contest at the Australian Open in January.
Nadal underwent surgery in June and returned to the competitive action at the Brisbane International on Sunday alongside Marc Lopez, who he won Olympic gold with at Rio 2016.
The pair fell to a 6-4 6-4 defeat to the Australian duo of Max Purcell and Jordan Thompson, but there were some promising signs from the 37-year-old.
Nadal now switches his attention to singles action and Tuesday's clash with 2020 US Open champion Dominic Thiem, who he practised with in Brisbane earlier this week.
