tom perrotta, we can welcome.believe back in november, about how serena williams then, you said, had the right to be acclaimed the best of all time. that was eight months ago. so now it's even more so, right? >> it is even more so. it's pretty amazing what she's doing, especially at this age. she's won seven grand slam titles in her 30s. it's really unprecedented. >> woodruff: how do you explain it? >> it's an amazing resurgence. she's really improved her fitness and her speed and her game a lot in the last few years. she hired a new coach and has really taken off. the thing that's the most amazing about her is the drive that she has at this age. i think most players when they get into their 30s, a lot of times burn out and a i think a lot expected her to burn out much sooner because she began when so young. it's been against the narrative everyone expected that she's been so good this long. >> woodruff: what's different about her game today than 12 years ago when she pulled off the remarkable feat of all four at

tom perrotta tweeting it's the greatest thing ever that the official wimbledon headband has too muchtion. a barely recognizable black bra. the chair ump complaining but the referee's office ruling there was no violation. if you think it's easy to skirt the law here take a look inside the competitor's guide that says quote white does not include off white or cream. a single trim of color, no wider than one centimeter is allowed. so when did wimbledon get so picky? it may seem like it's been this way for 137 years. but what about mcenroe venus, agassi. they had gotten a little more lenient until these showed up. that was too much and the 2014 it all stopped and it states only all white undergarments apply. turns out white may just be the new white. they are not kidding around right now agoa radwanska is playing. pretty boring looking but they do find their way to make their statement. if you look closely on the bottom ooh, she's getting wild with a little bit of lace much that's about as crazy as it gets here, guys. we'll have a lot more tomorrow on the women's semifinals and so much m