David Carry won Scotland's first medal of the Delhi Games, claiming bronze in the men's 400m freestyle.
Canada's Ryan Cochrane clinched the gold in 3:47.48, some way clear of the defending champion's time of 3:50.06.
Carry said: "I wasn't going to give it away without a fight, I really went out there in the first half of the race."
Hannah Miley came fifth in the 200m individual medley final, while 2006 winner Caitlin McClatchey failed to reach the final of the 200m freestyle.
"It's a medal, I'm delighted to do it," said Carry. "And seeing the Saltire flags all over the place is great. It feels like we're already in Tollcross in Scotland already.
"I'm delighted to be on that podium."Swimming results in detail
His team-mate, Robbie Renwick, came sixth with a time of 3:51.74.
Miley had been the fastest of the home nations' swimmers through to the 200m individual medley final but, with a time of 2:12.9, could not keep in touch with Australian pair Alicia Coutts and Emily Seebohm, who took gold and silver respectively.
The Scot said: "I need practice on getting up and getting out there on the first day.
"I've made it a little harder for myself because the 400m individual medley is my main event, so this is a splash-and-dash.
"I was pleased with the swim but disappointed with the time."
McClatchey had hoped to do better as she attempted to defend her title despite an illness-hit season.
"I am really disappointed with how I swam," she said. "I didn't think I was going to swim miraculously, but I thought I could do a bit faster.
"Maybe I just need one swim to get into the meet. I'm going to enjoy my other events, which come up soon.
"It was really tough to make the final. I thought it was going to be hard to defend my title, with regards the year I've had.
"I have been in and out of the pool, being ill. Every time I get back in, I get ill again, so it's been a bit of a frustrating year."
In Monday's last event, the men's 4x100m freestyle relay, Scotland finished fifth in 3:20.70, some way behind winners Australia, who touched home in 3:13.92.
Elsewhere, Kathryn Johnstone made it through to the final of the 50m breaststroke.