Nick Kyrgios capped off a terrific week at the Washington Open by beating Yoshihito Nishioka 6-4 6-3 in the singles final, before combining with Jack Sock to also win the doubles 7-5 6-4 against the team of Ivan Dodig and Austin Krajicek.

In the singles, Kyrgios' serve was overpowering against his Japanese opponent, winning 76 per cent (38-of-50) of his points on serve, and saving the only break point opportunity he faced, which came early in the opening set.

His return game was also sharp, collecting breaks of serve in the first game of each set to snatch all the momentum and keep Nishioka on the back foot and chasing all day.

Kyrgios finished with 12 aces to Nishioka's three, and finished the match just like he started it with a break of serve.

It caps off a tournament where he dropped only one set in his six matches – against Frances Tiafoe in the quarter-final – to win his first singles title since this same event back in 2019.

Just a few hours later, Kyrgios was back on the court with Sock contesting the doubles final, with the pair saving both break points they faced. 

After an even start, Kyrgios and Sock broke late in the first set, and then struck again to break in the opening game of the second set, going on to serve things out comfortably, never allowing Dodig and Krajicek to even reach deuce against their serve.

In doing so, Kyrgios became the first player to ever sweep both the singles and doubles in Washington.

He only had one doubles title before this season – back at the Lyon Open in 2018, also partnered with Sock – but Kyrgios has now won three in the past eight months, emerging triumphant with fellow Australian Thanasi Kokkinakis at both the Australian Open and last month's Atlanta Open.