Kyrgios controversy follows fellow Australian

Australia's Thanasi Kokkinakis, the subject of a controversial barb by pal Nick Kyrgios to Stan Wawrinka at Montreal, had some controversy of his own in qualifying for the Cincinnati Masters.

According to a Fox Sports report, Kokkinakis and American Ryan Harrison were involved in a heated match on Saturday night during which chair umpire Mohamed Lahyani twice had to climb down and separate the players.

Kokkinakis was agitated by a pair of call overrules Lahyani made on first-set break points in Harrison's favor, pressing his complaints to annoy Harrison.