What they say

"He was supposed to slow down. I said: 'What are you doing, it's a semifinal?'"

Usain Bolt, on his conversation with Canada's Andre De Grasse as they crossed the line in the 200m semifinals

"Not just Americans, but all over the world, we're always touched by gun violence, always touched by tragedy. It feels good to be an example, not just for Americans but families all over the world."

Kristi Castlin, US hurdler, uses her bronze-medal performance to speak out about gun violence

"This is unreal. It's more upsetting than I could ever imagine."

Kim Tea-hun, South Korean taekwondo athlete, on losing in the preliminary round

"Times don't matter, but medals matter."

Caster Semenya, 800m runner from South Africa

"They could have just shaken my hand and then go do their thing and go think about Spain, but they spared some very kind words, respectful words. I truly appreciate it."

Manu Ginobili, Argentina basketball star, on tributes from Team USA players and coaches after he retired from international play following Wednesday's loss

"We could be playing dominoes back at the apartment and they would all want to beat me and beat each other."

Adam Ktikorian, US women's water polo coach, on the competitive nature of his squad