Meet our team.
DAMON GILLETTE
General Manager
Denver Native
Started playing tennis at age 6
Played on the ATP World Tour & USTA Pro Circuit
Coached at Advantage Tennis Academy in Irvine, California
Active player in the Men's Open level in Colorado
Founder of Hi-Def Tennis
Member of the USPTA
Philosophy: "Serve +1 and Return +1 keep it simple”
Enjoys working with members to prepare them for their best tennis.
CATRINA THOMPSON
Assistant Manager/Head Pro
Achieved #1 USTA junior doubles ranking winning national junior titles on hard courts, clay courts, and grass courts.
Won 6 gold, 3 silver, and 2 bronze balls in USTA national junior tournaments.
Graduated from University of Notre Dame in 2007 with a BA degree.
Played #1 singles and #1 doubles at University of Notre Dame, was a three-time NCAA Doubles All-American and achieved career-high ITA/NCAA #1 doubles ranking (with twin sister and DTC member Christian Bass).
Women’s head tennis coach at University of Minnesota 2017-2023
Enjoys working with players to help assist in reaching their goals and enjoying the game of tennis.
TOMMY KOSZOWSKI
Junior Director
Colorado Native
7 years coaching experience
#1 singles and doubles at Regis Jesuit and Whittier College
1st Team SCIAC and academic honors
Co-founder & trainer of Hi-Def Tennis
AMINA ISMAIL
Tennis Professional
Achieved a top 10 doubles ranking at the University of Missouri, the highest in program history
Collectively earned a team ranking of #27 at Missouri (school record)
Career-high ITA singles ranking of #73 in the country
Big East Team Champion as a sophomore at Xavier University
10 years coaching experience
IGGY CASTELINO
Tennis Professional
Colorado Native
2023 USTA Colorado Male Player of the Year
2x Team Captain for the University of Denver Men’s Tennis Team (2018-2020)
High School State Champion at 5A #1 Singles for Fairview High School (Boulder, CO)
7 years coaching experience
“Serve +1 and Return +1…keep it simple out there.”
— DAMON GILLETTE, General Manager