Our Coaches

The strength behind Jeff Arons Tennis

Celebrating 38 Years of Tennis Excellence

Jeff Arons

Jeff Arons

  • Private coach for 17 student-athletes who have played at Stanford University (13 of these athletes earned All-American honors while at Stanford).
  • Privately tutored 4 NCAA singles champions from Stanford and 5 NCAA doubles champions also from Stanford.
  • Professional players he has coached have won 11 Grand Slam doubles titles (Wimbledon, US Open, French Open and Australian Open) and have been ranked as high as #5 in the world in singles and #1 in the world in doubles.
  • Inducted into the United States Tennis Association Northern California Hall of Fame in 2006.

Jeff Arons directs all tennis camp/clinic programming at Sacred Heart Schools in Atherton, California and serves as the school’s Director of Tennis. He has 38 years of playing and coaching experience. Jeff grew up in the Palo Alto Area and spent 11 years competing in junior tennis tournaments. He attended Gunn High School in Palo Alto where he was a member of the Gunn teams that won 200 straight dual matches and claimed 10 consecutive Central Coast Section team championships. Jeff went on to be a four year starter at Stanford University where he earned All-American honors, played on two NCAA championship teams, and was a two-time Pac-10 doubles champion (with Scott Davis and Mike Falberg).

Jeff has over 20 years of coaching experience working with players of all ages and skill levels. He has been fortunate to have had a unique set of coaching opportunities that have helped him develop as a coach. He spent 12 years in East Palo Alto creating and directing an inner-city tennis/academic after-school program: East Palo Alto Tennis and Tutoring Program (EPATT). In 1994, this program was recognized by the ATP (Association of Tennis Professionals: the professional tennis players’ union) as one of the top eight inner-city tennis programs in the world. In addition, Jeff has served as a private coach for over 30 highly ranked junior players who have gone on to play tennis at such schools as Stanford University, Harvard University, Yale University, Brown University, Dartmouth College, University of Pennsylvania, University of Notre Dame, University of North Carolina, and the University of Illinois.

Jeff Arons Tennis Coaching Staff

Passionate, Dedicated, Supportive


“I have known Losaline, Jack, Diana, Francisco and Jared for over twenty years. I have had the pleasure of coaching each of them while they were playing competitive tennis and have spent over a decade working with them in various tennis related contexts. They bring a wealth of playing and coaching experience to our program and I suspect you will enjoy working with them as much as I do! “

Jeff Arons

Losaline Mafileo - Jeff Arons Tennis

Losaline Mafileo

Losaline grew up in East Palo Alto and learned the game of tennis through her involvement with East Palo Alto Tennis and Tutoring Program (EPATT). She earned a scholarship to attend Pinewood High School (1993-1996) where she played #1 singles as a sophomore, junior, and senior. Losaline went on to play #1 singles and doubles at De Anza Junior College where she led her team to a state championship. She then went on to play at Cal Poly Pamona where she competed at the #1 position in both singles and doubles for the Broncos. Losaline earned her bachelor’s degree in Kinesiology and Health Promotion. Since the 2003-2004 school year, Losaline has served as the head tennis coach for both the girls’ and boys’ tennis teams at Sacred Heart Prep where she has led the Gators to league, section, norcal, state and national titles.

Jack Helu - Jeff Arons Tennis

Jack Helu

Jack grew up in East Palo Alto and learned the game of tennis through his involvement with East Palo Alto Tennis and Tutoring Program (EPATT). He earned a scholarship to attend Pinewood High School where he competed on the tennis team for four years (1993-1996). Jack was a main contributor to Pinewood’s 1995 team that lost a hard fought 4-3 decision in the Central Coast Section finals to Paly (Palo Alto High School). Jack served as an instructor/mentor at Dexterity Sports and Literacy – a non-profit organization that served at-risk children in East Palo Alto. In 1996, Jack entered and won the fast serve contest at what is now the Sybase Open — his fastest serve was clocked at 121 mph. In addition to his powerful serve, Jack is known for his kind and patient disposition, and his ability to make tennis an enjoyable experience for all the students he coaches.

Diana Sumner - Jeff Arons Tennis

Diana Sumner

Diana was an outstanding junior tennis player earning a USTA Northern California ranking of #3 and a national ranking of #64 in the Girls 18’s division. She played #1 singles for Menlo Atherton High for thee years and was recruited by the University of California, Berkeley to play tennis for the Golden Bears. Diana also has an extensive background in coaching. She worked as a coach for the East Palo Alto Tennis and Tutoring Program (EPATT) for 10 years. In addition to coaching at EPATT, she taught tennis at Alpine Hills Tennis and Swimming Club and was the head coach of the Menlo Middle School team. Diana has spent 5 years as a coach for Jeff Arons Tennis.

Jared Palmer - Jeff Arons Tennis

Jared Palmer

Jared has excelled at every level of competitive tennis. He was ranked among the top 5 players in the United States in B-12’s, B-14’s, B-16’s, and B-18’s divisions. He was a singles finalist at the French Open junior event and won the doubles at Junior Wimbledon. He attended Stanford University where he was a key member of the 1990 NCAA championship team. While at Stanford, Jared won the 1991 NCAA singles championship and reached the finals of the 1991 NCAA doubles tournament.

As a professional player, Jared was ranked as high as #35 in the world in singles and #1 in the world in doubles. Jared won the men’s doubles titles at the Australian Open (1995) and Wimbledon (2001). He was a men’s doubles finalist at Wimbledon (1999) and the US Open (2001). He was mixed doubles champion at both the US Open (2000) and the Australian Open (2000). Jared played Davis Cup for the United States six times and represented the United States at the 2000 Summer Olympic Games in Sydney, Australia. Jared was inducted into the Stanford Athletic Hall of Fame (2006) and the Northern California Tennis Hall of Fame (2013).

Cornell Wilder - Jeff Arons Tennis

Cornell Wilder

Cornell grew up in East Palo Alto and learned the game of tennis through his involvement with the East Palo Alto Tennis and Tutoring Program (EPATT). Cornell earned a scholarship to attend Pinewood High School where he was a four year starter (1993-6) on the tennis team. He was the co-captain and the #2 singles player on Pinewood’s 1995 team that lost in the Central Coast Section finals to Paly (Palo Alto High School). Even though he did not begin playing tennis until the 7th grade, he became the first EPATT team member to attain a junior tennis ranking. Cornell also represented the United States twice in the ATP Grass Roots Challenge held in London, England. He was ranked top 25 in Northern California (USTA) and he graduated from Cal Berkeley in 2001, earning a bachelor’s degree in sociology. He spent two years working at Maxim Integrated Products (a leading technology company in San Jose) before taking over as the Director of Tennis for Dexterity Sports and Literacy — a non-profit organization that serves “at-risk” children in East Palo Alto, CA. While at Dexterity, Cornell built relationships with the Ravenswood City School District and formed community partnerships that helped to create a P.E program, an after-school program and a traveling tournament team that produced ranked players in Northern California.

Zach Novak - Jeff Arons Tennis

Zach Novak

Zach grew up locally in the Menlo Park/Atherton area. He played on the Menlo-Atherton High School tennis team for four years, earning all PAL honors his junior and senior year. He captained the team senior year, and helped the team win 4 PAL titles in his four years there, including nearly advancing to the Central Coast Section finals in 2014. Zach joined the SHP coaching team in the fall of 2014. While working the Sacred Heart clinics and camps, Zach also spends time as the head Junior Varsity Coach at his alma-mater M-A, a job he began working immediately following his graduation from the school. Zach is known for his high energy, non-stop motor coaching style, and sense of humor.


Francisco “Paco” Lopez

Francisco grew up in East Palo Alto and became passionate about tennis through his involvement in the East Palo Alto Tennis and Tutoring Program (EPATT). During his freshmen year at Sequoia High School Francisco won the Pacific Athletic League’s doubles title with fellow Sequoia freshman and EPATT team member Julio Hermosillo (Francisco and Julio were the only freshman to qualify to participate in the tournament!).

Francisco has been coaching tennis for over fifteen years. He has helped build quality tennis programs at various Bay Area clubs and junior training academies. Francisco is a skilled and passionate teacher who enjoys helping his students improve their on-court skills.

In addition, Francisco is a trained USPTA Elite Professional who specializing in footwork and serving technique.