"Morning Champ. How do you fancy No.1 Court for your semi?" Such is the star-power of Kevin Anderson. Basically, Federer never loses to people who just serve, so expect this one to be over in short order.

Federer holds to love, and looks about ready to break.

Federer gets to 30-all but Anderson does really well to close out from there, showing a lovely touch at the net in the process.

A love hold for Federer.

Anderson is holding nicely these days, after Federer gave him hell in set 1.

2011 was the last time Federer lost a game from two sets up, in the quarter here against Tsonga. He holds to love, and opens a new racket while glugging what looks like filthy dishwater.

Anderson wins the first point of the set with a brilliant backhand winner down the line, for all the good it does him; Federer holds easily.

BTW and FYI, the below...

Immediately, Federer takes his own mini-break and stretches to 5-2; Anderson must hold his next two serves but can manage only one, a lovely inside-out forehand giving him three set points. He looks ready to take the first, opening the court with a big serve, only to then go long with a forehand ... and again! But what a forehand does Federer produce when Anderson serves, hard, top-spun harder, and whooshing into the corner thereby forcing the error. That's 44 sets in a row for him; not bad.

Anderson kicks-off with an ace down the T and then uncorks a banging return, dictating the rally before Federer nets; the mini-break is his. But not for long, two glorious sliced backhands snatching it back a-sap.

Check out Kevin Anderson! He dominates the first point of the game, finishing it with an ace, then puts plenty on a forehand return to dictate the next rally ... eventually Federer nets! 0-30! A service winner follows, then a netted return, two more big serves, and a breaker it shall be!

From 40-0 Federer gets to 40-30, but puts just too much on a forehand and must now serve to stay in the set, whole Anderson is assured of a breaker.

Anderson's return speed is well up on what it was and he wins the first point of this service game only for Federer to claw it back with a fine second serve. He closes out from there easily enough.

Another love hold for Anderson, who's looking pretty confident on serve now. Federer will now try to stay in the set.

Federer thinks he's held to love, letting a forehand go, only for it drop over his shoulder and in. So he wins the next point instead.

Anderson holds to love.

We see a graphic that shows us how much closer to the baseline Federer stands than Nadal, giving the server less time to react to his return, which comes at him quicker. Anyway, again Federer has to face a break point .. and this time he saves it, even yelping in triumph. Two first serves later, the set is level.

Time's up. Federer starts playing and at 15-30 he chases to the backhand side and as he slips, guides a lob over the 8"9 Anderson and in! That is frankly obscene. But Anderson saves both break points ... then loses his break on the first deuce. He's doing his best to pretend to the contrary, but let's be real: he knows.

At last, the fightback begins. Federer holds to love, somehow.

A love-hold for Anderson! He's rinsing it!

Anderson finds a couple of returns to get 0-30, and after Federer closes, another, down the middle to the ankles, gives him two break points! And look at that! His next return loops off the line so is only poked back, and there he is to despatch a winner! 85 and out for Federer!

Anderson disappears, as you might, and is then praised for his body-language, which tells you all you need to know. Again, he finds himself at deuce, but two aces get him sat down again.

Anderson has been on court four hours longer than Federer this Wimbledon, and this set is over in 26 minutes. He is just so stupidly good, cementing things to love and finishing with a forehand drop. Boris says he's "very unique" and perhaps in his regard that tautology is permissible.