No. 3 Seed Adachi Upsets Field to Win Boys' 12 & Under Title at L5 Open Mountainside Racquet Club

Kei Adachi captured the Boys' 12 & Under singles title at the Level 5 Open L5 Open Mountainside Racquet Club, held April 3-5, 2026 at Mountainside Indoor Tennis Center, Mountainside, NJ. Kei Adachi pulled off the surprise of the tournament, knocking off No. 2 seed Reagan Chou 6-4, 6-3 in the final.

The Final

The final brought together No. 3 seed Kei Adachi and No. 2 seed Reagan Chou. Adachi controlled the match from start to finish, winning 6-4, 6-3.

Semifinals

Adachi (No. 3 seed) defeated Rambhia 6-1, 6-1.

An Upset-Filled Quarterfinal Round

Rambhia pulled off the upset of the draw, rallying past No. 1 seed Friedlander 4-6, 6-1, 1-0(6) in a hard-fought three-set battle.

Adachi (No. 3 seed) defeated Aggarwal 6-2, 6-2.

Ching upset No. 7 seed He, winning 6-4, 6-3.

Chou (No. 2 seed) defeated Sankar 6-3, 6-1.

Detailed Results

Final

Kei Adachi [3] d. Reagan Chou [2], 6-4, 6-3

Semifinals

Kei Adachi [3] d. Kabir Rambhia, 6-1, 6-1

Quarterfinals

Kabir Rambhia d. August Friedlander [1], 4-6, 6-1, 1-0(6)

Kei Adachi [3] d. Viaan Aggarwal, 6-2, 6-2

Ethan Ching d. Austin He [7], 6-4, 6-3

Reagan Chou [2] d. Utham Sankar, 6-3, 6-1