Elmer Moller began brightly against the World No 12 but ended up losing his grand slam debut in the French Open.
Moller otherwise got off to a terrific start in his grand slam debut on Sunday, but he couldn't go the distance in the first round of the French Open.
After winning the first set, Moller lost to big favorite Tommy Paul with 7-6, 2-6, 3-6, 1-6.
21-year-old Moller managed to show the audience on the third largest arena, Court Simonne-Mathieu, that he is a man of the future and will probably soon become a regular grand slam participant as part of the top 100 (He is currently ranked 108 in the world)
American Tommy Paul is seeded 12th in the tournament and showed his skills on clay by reaching the semifinals of the Masters 1000 tournament in Rome, where he won a set from world number one, Jannik Sinner, nine days ago.
Moller is known for having a top-class backhand, and that particular shot worked well for the Dane as he time and time again outplayed the American in the opening set.
Moller broke the American's serve for the second time in the match to lead 3-2 and had the first set within sreach. However, at set point at 5-4, his backhand failed, and the American hit back and took the set to a tiebreak.
In the tiebreak Moller showed courage on the decisive balls, and claimed the set with a strong forehand on this third setpoint.
Bu then Tommy Pauls used all his experience to add more stability to his game and gradually dug himself back into the match as the number of unforced errors from Moller's racket began to increase.
Moller never managed to capitalise on the momentum from the first set, and once the American had taken control of the match, he never gave it back to seal his ticket for the next round of the tournament.