Stephens at 28 years old is double the age of Fruhvirtova and surely did not want to lose to someone so young.
However the 2015 US Open champion Stephens soon found herself down a break of serve at 1-2 following several powerful serves and angled hard hitting groundstrokes from Fruhvirtova.
In a qualifying match earlier at Guadalajara, Fruhvitova had defeated the 2012 Roland Garros finalist Sara Errani of Italy 6-3, 6-4 to announce herself as a potential future threat.
Following a slow start the American began to mix more offensive and defense such as slice backhands and forehand loops to mix up the baseline pace of play.
Stephens as well struck several powerful down the line forehand winners.
Fruhvirtova was more and more unable to stay in longer baseline points with the American and would strike a winner or more increasingly as the match went on an error to end the point.
Serving down 1-2 in set one, Stephens won nine games in a row to take set one and lead 4-0 in set two.
A powerful Fruhvirtova down the line backhand winner combined with several baseline errors from Stephens led to the Czech holding serve to trail 4-1.
Stephens then struck two crosscourt baseline winners to hold serve to extend her lead to 5-1.
Serving to stay in the match, Fruhvirtova struck a down the line backhand winner on game point to reach 2-5.
Stephens, serving for the match, went ahead 30-15 following two Fruhvirtova baseline errors.
The American, ranked 57th, then struck two forehand winners to end the match.
The young Czech became the youngest player to compete in a professional tennis match since the American Madison Keys in 2009.
And to help her along her tennis ascent is Brenda's older sister Linda who at age 16 is ranked 3 in girls' junior tennis
and 337 in women's professional tennis after also showing impressive tennis at an early age.