SHANGHAI: Rising Spanish star Rafael Jodar was warned for unsportsmanlike conduct after shouting an expletive at a ballboy in the fourth round of the Shanghai Masters on Wednesday.

Jodar, 20, was trailing Botic van de Zandschulp after losing the first set on a tie-break when he shouted in Spanish: "Give me the [expletive] towel!"

He had fired a shot just long to lose a break point in the first game of the second set.

Jodar was swiftly issued a warning for unsportsmanlike conduct, a violation of the ATP rulebook, by Ecuadoran chair umpire Jimmy Pinoargote.