Former junior world number one Shintaro Mochizuki featured for Japan in the country's comprehensive win against Pakistan in World Group I of the Davis Cup.
The 17-year-old, who won the junior men’s singles crown at Wimbledon in 2019, played in the doubles rubber alongside Sho Shimabukuro at the Pakistan Sports Complex in Islamabad
They came back from a set down to beat Aqeel Khan and Aisam Qureshi 4-6, 6-4, 6-2.
It turned out to be the only set dropped by Japan during the tie.
Yosuke Watanuki defeated Khan 6-3, 6-2 in the opening singles match, before Kaichi Uchida won 6-4, 7-6 against Qureshi.
Yuta Shimizu confirmed Japan's victory by easing past Muzammil Murtaza 6-1, 6-1.
It was a closer affair in the tie between Ukraine and Israel at the Marina Tennis Club in Kiev, with the hosts eventually winning 3-2.
Illya Marchenko put Ukraine in front after beating Daniel Cukierman 1-6, 6-3, 6-2, before Edan Leshem levelled the tie for Israel by triumphing 6-3, 3-6, 6-2 against Sergiy Stakhovsky.
Cukierman then partnered with Jonathan Erlich to battle past Stakhovsky and Denys Molchanov 6-4, 4-6, 6-3.
The scores were brought level once again by Marchenko, who defeated Leshem 6-3, 6-2.
Stakhovsky was victorious in the decider against Yshai Oliel, winning 6-4, 6-2 to hand Ukraine the tie.
Both Japan and Ukraine will have to wait until September to find out whether they are among the eight highest-ranked teams to progress to the 2022 Davis Cup qualifiers or whether they will compete in an extra knockout round, scheduled to take place in November.
What. A. Match. 👏— Davis Cup (@DavisCup) March 6, 2021
Gerardo Lopez Villasenor defeats Kuzmanov 7-6(6), 4-6, 7-6(5) in 3 hours and 37 minutes to clinch the tie and keep Mexico in the hunt for a spot in the WG I 2022 Play-Offs
Two matches also took place in World Group II.
Hosts Bulgaria lost 3-1 to Mexico at Sport Hall Sofia.
Dimitar Kuzmanov earned Bulgaria's only win in the opening singles clash, crushing Luis Patiño 6-1, 6-1.
Gerardo López Villaseñor came back from a set down to beat Adrian Andreev 3-6, 6-1, 6-2, before Hans Hach Verdugo and Miguel Ángel Reyes-Varela gave Mexico the lead with a 6-4, 6-4 victory over Gabriel Donev and Alexandar Lazarov.
López wrapped up the tie by edging past Kuzmanov 7-6, 4-6, 7-6.
Despite missing world number 30 Hubert Hurkacz, Poland recorded a 3-1 win over El Salvador.
Marcelo Arévalo was El Salvador's solitary winner with a 6-4, 6-2 victory against Wojciech Marek.
Kacper Żuk overcame Arévalo 7-6, 6-1, before Kamil Majchrzak thrashed Lluis Miralles 6-0, 6-0 to give Poland a 2-0 lead.
Łukasz Kubot and Jan Zieliński were comfortable 6-4, 6-2 winners over Arévalo and Miralles in the doubles.
The eight highest-ranked winners of the World Group II ties will automatically progress to the 2022 World Group I playoffs.
The four lowest-ranked teams will take part in an additional knockout tie due to be staged in November, with the two winners progressing to the 2022 World Group I playoffs and the two losers contesting the 2022 World Group II playoffs.
The remaining 20 World Group I and World Group II ties are scheduled for September.