Underarm serves, a completely legal practice in tennis but have become obsolete over the years.
The controversial underarm serve has become a common feature in several men's and women's matches at the French Open over the past few days.
The underarm serve has been at the forefront of one of the biggest tennis debates of the year, but do they really work for players like Nick Kyrgios
As Nick Kyrgios’ underarm serve against Rafael Nadal at the Acapulco ATP 500 has captured the headlines over the past few days.
Find sources: "Serve" tennis – news · newspapers · books · scholar · JSTOR (February 2010) (Learn how and when to remove this template message)
PARIS — Thirty years after Michael Chang hit the most famous underarm serve in history at the French Open, that little bit of strategy — frowned upon by some — is making its way back into tennis, it seems
Nick Kyrgios says Rafael Nadal is to blame for his use of underarm serves, and he doesn't understand why so much controversy surrounds them.
Wimbledon: Kyrgios gets an underarm serve ace against Nadal.
Thinking about a underhand serve? Here's a breakdown of why it might or might now work, and alternatives to the underhand serve ...
Nick Kyrgios underarm serve does not impress Rafael Nadal who says it lacks respect.