- Wimbledon, Day 11
Youth versus experience, sort of
You've been served
Fresh from matching the record for number of aces in a single women's singles match (23) earlier in the tournament, Williams broke her own record for good measure during her triumph over Azarenka.
Her 24th ace of the bout, straight down the middle, was also on her second match point - a fitting way to win a semi-final where her serve had been about the only difference between the pair.
While Radwanska will be playing in her first ever grand slam final, Williams will be taking the stage at the All England Club for the seventh time in her career - having won on four of her six prior appearances.
This will be her 18th career grand slam final appearance, and she's won on 13 of those occasions. It's safe to say that it is she who has the experience - and Radwanska who still has a whole lot of learning to do.
Age is no barrier
Women's tennis is often characterised as a young player's game - indeed, Radwanska is just 23 - so it's worth putting into perspective just how impressive Serena's achievement really is.
Serena, in another grand slam final, is 30. Former US world No. 1 Lindsey Davenport - a player who essentially retired in 2008, and now commentates on Serena's displays for the BBC - is still only 31.
The cream rises to the top
The perception might be that women's tennis has a huge number of evenly-matched players that makes it almost impossible to guess who will reach the latter stages of grand slam events, but you can't say that the most in-form players aren't identified.
After all, Thursday's four semi-finalists have claimed 11 titles between them already this season - four for Azarenka, three for Radwanska and two apiece for Williams and Kerber. That's a pretty impressive run of success by anyone's standards.
Now that's a run of futility
Agnieszka Radwanska's success means she is the first Polish player to reach the final of Wimbledon for 75 years - since Jadwiga Jedrzejowska back in 1937. And Jedrzejowska lost! Rather puts British pains over the lack of a domestic winner into perspective, doesn't it...