Nick Kyrgios stuns opponent with bizarre new underarm serve tactic

Aussie Nick Kyrgios used his trademark underarm serve in the Round of 32 of the the Stuttgart Open but added a twist to unsettle his opponent.

Kyrgios was on serve at the beginning of the match against Italian Matteo Berrettini when he threw in an underarm.

However, the Aussie decided to charge into the net off the underarm serve expecting a volley.

Nick Kyrgios produced an extraordinary point in Stuttgart. (Images: @TennisTV/Getty Images)

But the Italian lobbed Kyrgios and the Aussie reacted with an insane tweener lob.

He was able to finish the point off after getting a forehand return.

The odd tactic of an underarm serve and volley paid off on the grass surface.

But unfortunately, Kyrgios went on to lose the match 6-3, 6-4.