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John Hansen, the New Zealand judge who heard the racism charge against Harbhajan Singh, has said that Australian all-rounder Andrew Symonds had made an unprovoked attack on the Indian spinner. A copy of Hansen’s judgment makes clear that Symonds had no reason to get involved in the banter between Harbhajan and Brett Lee. Harbhajan patted Lee during the Sydney Test and told him “well bowled”. Symonds thought Harbhajan was sledging Lee and he swore at the India spinner.
What does "sledging" mean here?
In this context, it means to break the opponent's concentration by insulting them, thereby leading to mistakes in his play. Chiefly used against the batsman at the wicket.