Kyrgios's brilliant act of sportsmanship for Tsonga

Nick Kyrgios has shown his class with a wonderful act of sportsmanship for opponent Jo-Wilfried Tsonga.

Late in the fourth set of their match at the Australian Open on Friday night, Tsonga thought he'd hit a clean winner but the ball was called out.

KING KYRGIOS: Nick storms past Tsonga into fourth round

The Frenchman was weighing up whether to challenge the call with Hawk-Eye, before Kyrgios made the decision for him.

"It was in man," Kyrgios told his opponent. "You should challenge."

Kyrgios could have kept his mouth shut and potentially won the point, but he effectively hindered himself so the right call could be made.

Tsonga did end up challenging, with the call proving to be wrong, giving Tsonga the point.

However Kyrgios brought a huge smile to Tsonga's face when just before the replay was shown, he said "You never know though."

The brilliant moment came just a few games after Tsonga was involved in a fiery moment with a fan, challenging the spectator to come down to the court over something they had said.

Kyrgios went on to prevailed in a big-serving battle of wills, downing the Frenchman in four sets to progress to the round of 16.

The Australian's clutch efforts during tiebreaks proved decisive in a 7-6 (7-5) 4-6 7-6 (8-6) 7-6 (7-5) victory, earned in three hours and 17 minutes.

Kyrgios and Tsonga once again showed their respect for one another at the net after the final point.

with AAP