Novak Djokovic began his bid for a record 25th Grand Slam singles title with a straightforward win over Radu Albot in the US Open first round.
One more major would give Djokovic sole ownership of the all-time record for the most major singles titles. He is currently tied with Margaret Court on 24.
The 37-year-old won 6-2 6-2 6-4 in his first match since clinching Olympic gold 23 days ago.
Serbia's Djokovic, who has swept up almost every title there is in tennis, described the triumph in Paris as his "biggest sporting achievement".