Félix Auger-Aliassime lost to Flavio Cobolli on Wednesday in the French Open quarterfinals.
What happened?
The 25-year-old Canadian was up a set and a break but couldn't maintain his lead.
Cobolli finished with a 4-6, 6-4, 6-4, 6-4 victory.
Auger-Aliassime's body language turned negative as the match slipped away.
He argued with the chair umpire over a service let cord.
Why it matters for Félix Auger-Aliassime
Auger-Aliassime will reach a new career high ranking of No. 4 on Monday.
But he's frustrated with his progress, feeling he's not improving as he wants.
He's aware of his peers, like Stefanos Tsitsipas and Andrey Rublev, who are also struggling to take the final step.
What comes next?
Auger-Aliassime had a brief resurgence in the third set with seven break-point opportunities.
But he couldn't convert any, and Cobolli seized the moment.
The wind was a factor early on, with gusts blowing the red clay everywhere.
Auger-Aliassime excels in indoor conditions but couldn't capitalize on the closed roof.
He's growing more impatient as years go by, feeling he's not where he wants to be in his career.
Auger-Aliassime is 26 this year and feels he's not improving as he should.
The loss was a difficult one for him to swallow, given the promise he showed early in the match.