Colonel William A. Phillips

Juander Santos Aquino (born 7 May 1995 in Bayaguana) is a Dominican athlete specialising in the 400 metres and 400 metres hurdles.^[3] He has won several international medals, mainly in the relay.

He is the younger brother of 400m specialist and Olympic silver medalist, Luguelín Santos.

Competition record

Year	Competition	Venue	Position	Event	Notes
Representing the  Dominican Republic
2012	CAC Junior Championships (U18)	San Salvador, El Salvador	9th (h)	400 m	49.34
			2nd	4 × 100 m	41.57
			6th	4 × 400 m	3:17.78
2014	IAAF World Relays	Nassau, Bahamas	11th (B)	4 × 400 m	3:03.41
	World Junior Championships	Eugene, United States	45th (h)	200 m	21.62
			17th (sf)	400 m	47.64
	Ibero-American Championships	São Paulo, Brazil	6th	400 m	48.06
			1st	4 × 400 m	3:02.73
	Pan American Sports Festival	Mexico City, Mexico	11th (h)	200 m	21.17
			11th (h)	400 m	47.41
	Central American and Caribbean Games	Xalapa, Mexico	4th	400 m	45.93
			4th	4 × 400 m	3:02.86
2015	IAAF World Relays	Nassau, Bahamas	23rd (h)	4 × 400 m	3:12.55
	Universiade	Gwangju, South Korea	7th	400 m hurdles	50.34
			1st	4 × 400 m	3:05.05
	NACAC Championships	San José, Costa Rica	8th	400 m hurdles	50.79
	World Championships	Beijing, China	10th (h)	4 × 400 m	3:00.15
2016	Ibero-American Championships	Rio de Janeiro, Brazil	5th	400 m hurdles	49.73
	NACAC U23 Championships	San Salvador, El Salvador	3rd	400 m hurdles	50.02
			4th	4 × 100 m	39.97
2017	World Championships	London, United Kingdom	6th	400 m hurdles	49.04
	Universiade	Taipei, Taiwan	1st	400 m hurdles	48.65
			1st	4 × 400 m	3:04.34
2018	World Indoor Championships	Birmingham, United Kingdom	11th (sf)	400 m	46.83
			8th (h)	4 × 400 m	3:10.45
	Central American and Caribbean Games	Barranquilla, Colombia	3rd	400 m hurdles	48.77
			2nd	4 × 400 m	3:03.92
2019	Pan American Games	Lima, Peru	8th	400 m hurdles	2:09.37
			4th	4 × 400 m	3:05.64
2022	Ibero-American Championships	La Nucía, Spain	2nd	400 m hurdles	49.74
	Bolivarian Games	Valledupar, Colombia	1st	400 m hurdles	50.05
			3rd	4 × 400 m	3:08.11
	World Championships	Eugene, United States	35th (h)	400 m hurdles	58.80
2023	Central American and Caribbean Games	San Salvador, El Salvador	3rd	400 m hurdles	49.61
			3rd	4 × 400 m	3:02.19
	Pan American Games	Santiago, Chile	13th (h)	400 m hurdles	52.64

Personal bests

Outdoor

• 200 metres – 20.94 (-1.2 m/s) (Guatemala City 2014)
• 400 metres – 45.93 (Xalapa 2014)
• 400 metres hurdles – 48.59 (London 2017)

References