Seita Watanabe

Seita Watanabe (born 25 December 2000) is a tennis player from Japan. Watanabe has a career-high singles ranking of No. 915, and a career-high doubles ranking of No. 287.

All finals

 * Key
 * Italics – Indicates the player lost in the final.
 * † – Indicates a final not played.
 * Singles
 * Grade 4 – 🇯🇵 Hyōgo (30 Aug 2017), Manila (15 Nov 2016)
 * Grade 5 – Colombo (12 Sep 2016, 19 Sep 2016), 🇬🇺 Hagåtña (9 May 2016),  Phnom Penh (20 Feb 2017),  Saipan (17 May 2016)
 * Doubles
 * Grade B1 – 🇮🇳 Pune (29 May 2017)
 * Grade 1 – 🇨🇳 Nanjing (1 Aug 2017)
 * Grade 2 – 🇹🇭 Nonthaburi (17 Oct 2016, 16 Oct 2017), 🇹🇼 Tainan (29 May 2018)
 * Grade 3 – 🇨🇳 Beijing (9 May 2017), 🇨🇳 Shenzhen (28 Feb 2017)
 * Grade 4 – 🇲🇾 Melaka (3 Oct 2016), Manila (15 Nov 2016, 22 Nov 2016), 🇹🇭 Nonthaburi (20 Jun 2016, 27 Jun 2016, 24 Oct 2016),  Phnom Penh (20 Feb 2017)
 * Grade 5 – Colombo (5 Sep 2016, 12 Sep 2016), 🇬🇺 Hagåtña (9 May 2016),  Saipan (17 May 2016)

Junior Grand Slam timeline

 * Singles

Grade A tournaments

 * Singles
 * Doubles