Hawaii Tennis Open

As of July 2022, The Hawaii Open is now the Waikiki Cup.

The Hawaii Open is a hardcourt men's and women's professional tennis tournament held annually in Honolulu, Hawaii. The tournament features players from the WTA and ATP Tour. The invitational tournament occurs immediately before the ATP Tour and WTA Tour begin the new season in late December.

The Hawaii Open features three rounds of single-elimination matches played over three days in a best two-out-of-three set format. Third sets are played as a tie-break with the first to 10 points declared the winner.

History
The Hawaii Open tournament began as a WTA 125 event in 2016. During the first two years, the tournament was held at the Patsy T. Mink Central Oahu Regional Park during Thanksgiving week in late November.

2018 Hawaii Open
In 2018, the tournament added a men's draw and became a men's and women's invitational tournament over three days, December 21, 22, and 23. It featured six men and six women and moved to the Blaisdell Arena in Honolulu. The tournament also featured a pro–am at Kailua Racquet Club and a Players Party held at the Prince Waikiki.

Men's entrants

 * 1) 🇯🇵 Kei Nishikori (JPN)
 * 2) 🇨🇦 Milos Raonic (CAN)
 * 3) 🇺🇸 Ryan Harrison (USA)
 * 4) 🇺🇸 Christian Harrison (USA)
 * 5) 🇺🇸 Andre Ilagan (USA)
 * 6) 🇺🇸 Phuc Huynh (USA)
 * 7) 🇺🇸 Mackenzie McDonald (USA)

Women's entrants

 * 1) 🇧🇪 Elise Mertens (BEL)
 * 2) 🇪🇸 Garbiñe Muguruza (ESP)
 * 3) 🇨🇦 Eugenie Bouchard (CAN)
 * 4) Monica Puig
 * 5) 🇺🇸 CoCo Vandeweghe (USA)
 * 6) 🇺🇸 Christina McHale (USA)

2019 Hawaii Open
The 2019 Hawaii Open presented by Ward Village and Hawaii Tourism was held December 26, December 27, and December 28, in Honolulu, at the Stan Sheriff Center. The tournament featured five men and five women and moved to the Stan Sheriff Center in Honolulu. The tournament also featured a pro–am at the Four Seasons Tennis Centre and a Players Party held at Ward Village.

Entrants

 * 1) 🇺🇸 Taylor Fritz (USA)
 * 2) 🇺🇸 Sam Querrey (USA)
 * 3) 🇦🇺 Jordan Thompson (AUS)
 * 4) 🇺🇸 Brandon Nakashima (USA)
 * 5) 🇺🇸 Christian Harrison (USA)

Entrants

 * 1) 🇩🇪 Angelique Kerber (GER)
 * 2) 🇺🇸 Danielle Collins (USA)
 * 3) 🇯🇵 Misaki Doi (JPN)
 * 4) 🇧🇪 Yanina Wickmayer (BEL)
 * 5) 🇺🇸 Alyssa Tobita (USA)

Mixed doubles
A mixed doubles match was added to replace the women's singles final due to player withdrawal.
 * 🇺🇸 Christian Harrison / 🇺🇸 Danielle Collins def. 🇺🇸 Sam Querrey / 🇧🇪 Yanina Wickmayer, 6–4, 6–7(6–8), [10–6]