Andy Murray and Joe Salisbury reached the men's doubles quarter-finals at the Tokyo Olympics while Liam Broady registered a stunning singles victory.
The British duo backed up their impressive opening-round win to beat Germany's Kevin Krawietz and Tim Puetz 6-2 7-6 (7-2).
Murray is bidding for his fourth Olympic medal and Salisbury his first.
World number 143 Broady stunned Polish seventh seed Hubert Hurkacz 7-5 3-6 6-3 to reach the third round.
Broady, a late call-up to the squad, said on the eve of his Olympic debut he did not want people to "look at me and think I'm making up the numbers".
He was only added to the team a week before the Games after British number ones Dan Evans and Johanna Konta contracted coronavirus.
His victory over Wimbledon semi-finalist and world number 12 Hurkacz is his first over a top-20 player.
Broady will now face France's Jeremy Chardy, while Murray and Salisbury will play Marin Cilic and Ivan Dodig of Croatia next.
Murray 'physically OK' despite injury
Murray is bidding for a piece of history in Tokyo - no man has won four Olympic medals since tennis returned to the Games in 1988.
The Scot was advised not to compete in both the singles and doubles after picking up a minor thigh strain at the start of the Games and subsequently withdrew from the singles.
"When we spoke about playing, I told Joe that if I had any physical issues I'd prioritise doubles over singles and that's why I made the decision," Murray said.
"I'd have been annoyed with myself if I'd decided to play with the issue, made it worse, lost my singles and not been able to perform well in the doubles.
"Physically it'll be OK for the rest of the tournament, but I will need to take a break afterwards."
Greece's Stefanos Tsitsipas avenged his first-round Wimbledon loss with a 6-3 6-4 win over Tiafoe to reach the third round.
Argentine Diego Schwartzman also advanced, beating Czech Tomas Machac 6-4 7-5, while France's Chardyovercame Russian Aslan Karatsev 7-5 4-6 6-3.
Home favourite and second seed Naomi Osaka was earlier stunned in the third round by Marketa Vondrousova.