"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.

So there we go - join me elsewhere for the rest of Del Potro-Nadal and Raonic-Isner.

Wow! Anderson barely even celebrates. Maybe he's knackered, maybe he just thinks it's about time. He meets Raonic or Isner in the semi, but forget that for a second - this was so, so special, the match of his life. He attacked the great Roger Federer who was in an impregnable position, pulled it off, and here he is in the Wimbledon semi! What a match that was! Phew!

So here we go! Can Anderson hold his nerve! My heart is thumping, so I don't know how he's going to manage! Maybe he isn't! A net cord, then a serve that's wide, then a tired, nervous one that Federer returns well; Anderson can only hook wide. He responds with an ace ... incredible ...then they slug it out from the baseline and Federer goes long on the forehand. This is what's killing him here - he's not been able to win the longer points - and when Anderson powers a forehand down the line, he raises two match points! I cannot believe I'm even typing that! A SERVE DOWN THE MIDDLE, AND KEVIN ANDERSON HAS BEATEN ROGER FEDERER FROM TWO SETS DOWN! YES HE HAS! A FANTASTIC, WONDROUS, GUTSY PERFORMANCE! BRILLIANT!

Anderson gets to 0-15 so Federer glides a backhand winner down the line. But then it's 15-30 ... huge point. So what does Federer do? He serves wideish, then hops around his backhand to power a winner down the line. Course he does. AND THEN FEDERER SERVES A DOUBLE! HIS FIRST OF THE MATCH, HIS FOURTH OF THE TOURNAMENT! BREAK POINT! AND AFTER AN OK RETURN, FEDERER NETS ANOTHER FOREHAND! ANDERSON IS GOING TO SERVE FOR THE MATCH!

The elusive break just doesn't look like coming at the moment. Anderson holds to love, finishing things with a clean-up forehand. I don't know, I really don;t - this is barely tense at the moment, they're serving so well.

Anderson is still pushing, and a forehand error gives him 15-all. But, though he's in points thereafter, he still loses them all and must now serve once more to stay in the match.

Anderson is wearing Lotto, which is a blast from the past; wonder if he's got any Quaser He holds to love,

Love hold for Federer, who's been under hardly any pressure on his serve in this set. But all it takes is a couple of good returns and everything changes.

Anderson opens with an ace and a service winner, eventually holding to 15. That was smart, and I've still no idea who's winning this, never mind when they'll win it.

"I need to watch the football!" shouts an hilarious wag as Federer starts the game well before, at 40-30, Anderson shows incredible speed and anticipation to run down a drop, only just missing the line with his response.

Anderson holds to 15 but there were chances for Federer there - he just couldn't hit his straps. We go again.

Federer hasn't served one double this whole match and only three in the tournament, then at 15-all he plays a perfect point then advances and dumps a smash into the net! So he dredges up a great serve, then when Anderson hits a net cord next point, he has the presence of mind to adjust his approach and hit a drop, then clear up. What a man! He then finishes the game with another overhead before pouting and smouldering in his seat. He liked that.

Federer is coming. At 15-all he plays a forehand into the corner, then as Anderson comes back, another forehand fills in the gap. But Anderson swipes through a fantastic forehand winner, then slings an ace down the middle and a service winner out wide! What can you do?!

Federer is playing better now, and rushes through another love game. Check to you, Kev-o.

And there it is! A perfect return, cross-court, gets Federer ahead, then a beautifully put-together point allows him to finish at the net with a drop. But look at Kevin Anderson! A high-kicking second serve sees a backhand dumped into the net and in the next rally a slip is followed by a Federer forehand into the net. A brilliant forehand winner - out of nowhere - follows, but then another forehand wafts wide ad we have deuce. So Anderson finds an ace out wide - usually he goes down the middle - and wins the next point too! I have no idea how this is going to pan out.

The holds are coming pretty quickly now, and Federer's forehand looks a bit better than before. If he can get a decent return or two here, I'd not be surprised to see him put Anderson under.

Anderson is still as hot as when he started playing well and he holds to love.

Superb from Federer, holding to love. This is easily the best match I've seen this tournament, and who knows what's to come?

Anderson is serving so well - though I reiterate, that isn't why we are where we are. He quickly reaches 40-0 ... but then it's 40-30, and suddenly Federer glides a slice cross-court and Anderson can't respond ... in the moment. What does he have now? A first serve, but not enough otherwise! He sends a slice long, and here comes Federer! Anderson's first serve is good enough to save the break and then in a long rally his willingness to go for things allows him to dictate and make advantage - Federer is back to the Federer of three years ago, taking no risks. He does outlast Anderson to get back to deuce, but loses the next two points conclusively and the pressure is back on him.

Have a look! Anderson is knocking seven shades out of the ball and gets to 0-30! Federer responds with a serve that can't be returned, then another which is sent back long. This is terrific, nervy stuff, but Federer is fine, another big serve down the middle, then one out wide, and he's back sitting down. This is fantastic. Four huge serves, one after the other!