Hampton had taken out Radwanska in the first round of Eastbourne the week before Wimbledon, and for a while it looked like another upset may have been brewing, as Hampton went up a break twice early in the first set - but while she lost those battles Radwanska was focused on the overall war, and the No.1-seeded Pole ended up beating the No.4-seeded American routinely in straights, 63 62.
"It was definitely a much better match for me than my quarterfinal match yesterday," Radwanska said. "I was feeling the ball very well and serving very well, and I was just more consistent out there.
"I thought it would be tough to come back from the early breaks in the first set because she has been serving very well this week, but I was returning well too and managed to get the breaks back."
After her quarterfinal win over No.6 seed Varvara Lepchenko on Friday evening, Radwanska hit the practice courts for a little bit - what did she work on, and did it help her in the semifinals?
"The main reason I went out there was just to get the feel for the ball," Radwanska said. "Even when I had a ball to kill yesterday, I couldn't do it well on court - I didn't have the touch I wanted to have. I served a little bit as well afterwards. And I guess it helped - today was much better for me!"
"It's always tough playing Aga, she throws so many different looks at you, but tonight she just played better than me," Hampton said afterwards. "I had a good, solid start, then I botched a volley at 3-2, up a break, 30-0 or something, botched it pretty badly, and it was pretty much downhill from there.
"But it's a good result for me for the first tournament of the US hardcourt series. It's a positive that I made the semifinals here, and I'm only looking forward to the next tournaments coming up."
Next up for Radwanska is No.3 seed Dominika Cibulkova, who won her semifinal earlier in the day. It's a good match-up for her - Radwanska has beaten Cibulkova in all four of their previous meetings, including a 60 60 demolition in the final of Sydney just the week before the Australian Open.
"I didn't really expect that, especially in a final, and especially since she had been playing some great matches all week there," Radwanska said. "I think all of a sudden she was nervous going into the final, and game by game it was getting worse, I think she wanted it too much at that point, maybe.
"But she's definitely not the kind of player you can do that twice to. I'll just go out there and try to play the good tennis I was playing today, and then I'll have a good chance to win that one."
Radwanska is playing in her 17th WTA final, going 12-4 in her first 16. Eight of her 12 WTA titles have come at the Premier level - Eastbourne in 2008, Carlsbad, Tokyo [Pan Pacific] and Beijing in 2011, Dubai, Miami and Brussels in 2012 and - as mentioned just above - Sydney earlier this year.