Melbourne: Tennis Australia and the Australian Olympic Committee (AOC) are at loggerheads over the treatment accorded to star tennis player Nick Kyrgios, after the World No.19 on Friday announced his shock withdrawal from the Rio Olympics.

In a statement, Kyrgios, 21, said he was "extremely disappointed" to withdraw from contention, but the negative attitude of the AOC was the key factor in the decision, reports Xinhua.