Carlos Alcaraz is such a constant ray of sunshine on court that it always seems a surprise when a darker, chuntering mood descends.
Yet the Spaniard was still able to win the battle with his own mind to earn his 100th tour clay-court victory and advance to the French Open quarter-finals.
The 22-year-old subdued dangerous Ben Shelton 7-6 (10-8) 6-3 4-6 6-4 on Court Philippe Chatrier on Sunday, meaning he's now lost a set in each of the last three matches of his title defence.
