In another light-hearted moment during the match, Tsitsipas asked his coach for new shoes but it was Kyrgios who ran to the side of court to collect them and promptly deliver them to Tsitsipas' chair court-side. "And it's two-for-two", Kyrgios said. At 5-5, Tsitsipas won eight consecutive points to grab the early advantage.
"My laces are breaking on the last hole, when I'm sliding forehand side. I didn't give him much pace to play with and that played a big part overall". Kyrgios waited out the process by leaning on a screen at the back of the court, then chose to speed things along by getting that sneaker from Dad and carrying it across the court to Tsitsipas. Kyrgios presented it on bended knee, with head bowed, as if to say, "Here, my lord".
Kyrgios broke again to open the second set but after a review call went against him double-faulted away a break, slamming his racquet and towels to the court in frustration. Spectators reveled in it all.
Kyrgios and Tsitsipas never had faced each other and, in the past, they've had their differences.
The concluding tiebreaker was a roller-coaster.
They battled into the tie-breaker, with Kyrgios racing ahead 5-1, then losing the next five points - four after a ball girl was slow in taking a towel from him - only to deny Tsitsipas on match point with a service victor. Kyrgios erased that with a 132 miles per hour service victor. On the second, he went and spoke to a front-row spectator, as though seeking advice, closed out the victory with a big serve followed by a forehand victor, then went back to shake the man's hand.
It was the Greek star's first match against Kyrgios, who is of Greek and Malaysian heritage.
Love him or hate him - and there are plenty of people in each camp - Kyrgios is a showman, someone who does the sorts of things few, if any, other tennis players do, for better or for worse. Some people think I'm doing it on objective. "Otherwise, everything becomes too serious".
As great as Kyrgios is playing in the Citi Open, his match point with a fan assist was, of course, only one of his notable moments in the tournament.
The 24-year-old also played brilliantly for the majority of the 6-4 3-6 7-6 (9-7) semi-final victory which improved his record against top 10 players to 4-1 this year.
In the women's draw, teenager Caty McNally upset fourth-seeded Hsieh Su-wei 6-4 6-3 to reach the semis in her first WTA tournament and set up a meeting with Camila Giorgi, who defeated Zarina Diyas 6-3 6-2. I think that's good for me psychologically.
She'll face Zheng Saisai for a place in the final after the 55th-ranked Chinese player out-lasted fourth-seeded United States teenager Amanda Anisimova 5-7, 7-5, 6-4.