The Bryan brothers are life-long musicians as well as Grand Slam champions.
Bob Bryan's serve was not music to brother Mike's ears on Friday.
Watch big-serving Bob nail Mike right in the noggin with this serve that sends his twin tumbling to the turf. The serve was so big, you can hear the sound of the ball bounding off the back of Mike's head
Fortunately, Mike shook off that head shot. The Bryans went on to defeat compatriots Steve Johnson and Sam Querrey and reach the third round.