Hello and welcome to our live coverage of the US Open semi-final between Andy Murray and the man who knocked out Roger Federer, Tomas Berdych. David Ferrer or Novak Djokovic await in the final.

GAME, SET AND MATCH MURRAY! Berdych speeds into a 3-0 lead with some delicious hitting. Murray claws back to 3-1 after the Czech dumps a return into the net. Murray then cracks the forehand off a net and out to fall 4-1 behind. Astonishing change in this match. Berdych goes long seconds later to lead 4-2 before throwing down an ace on a second set to move 5-2. Murray hits back with a backhand to close to 5-3. Murray facing set point against him at 6-5 , but comes through 9-7.

6-6 - Murray coming up with an exceptional forehand and winning volley to claw back to 30-40 behind after another bout of big serving by Berdych. But he can't fend off the ace by Berdych in the next point as we head for the breaker. All on the line now.

MURRAY 6-5 - A brilliant hold to love by Murray, who has had to dig deep to find his best tennis in such demanding conditions. The standard of tennis in such wayward conditions is exceptional. Can Berdych force the set to the lottery of a breaker? He serves for a second time to remain in the match.

5-5 - Berdych battles back to draw level from 15-30 down. Another massive serve from the big Czech of 130mph out wide seals the deal. From nowhere, the Czech player is all over Murray like a rash. A real fight to the line here. Murray battling to avoid this going to a fifth set.

MURRAY 5-4 - Big hold for Murray there with Berdych suddenly finding his timing on the forehands. Murray not finding the variety that was helping him establish this advantage, but he has forced Berdych to serve to remain in this match.

4-4 - Another clear winner from Berdych as he holds to 30 to really ask questions of Murray, who seemed to be cruising to the final to this final, but is suddenly back in the heart of a dogfight here. Tense times again. Huge service game coming up here for Murray.

MURRAY 4-3 - A cry of 'c'mon' from Murray as he goes back in front with this match running for three hours and 20 minutes. A convincing hold to 15 just when he needed it. Murray trying to stir himself for one last push here. Doesn't want to be hanging around out there needlessly. A fifth set would plunge this result back into doubt.

3-3 - A love game from Berdych to level matters in this fourth set. Not sure what is going on out there. Murray was chipping the ball, and spinning it. Berdych was well out of the match, but suddenly he has started hitting it. And Berdych loves power. Murray has managed to get himself back into a tight spot. After he had his foot on Berdych's neck leading 3-1, there is work to be done by Muzza to get this done in four.

BREAK BERDYCH! MURRAY 3-2 - Murray paying the price for failing to grab the insurance policy of the double break in the previous game as he begins to swing freely to bring up three break back points. Misses a golden chance in the first point as he nudges a forehand wide. Murray under pressure on serve for the first time in some time. Pushed back as Berdych converts the break on the third attempt. Set back on serve. Didn't see that coming.

MURRAY 3-1 - Berdych throws down a massive second serve before drilling the ball around the court. Wins the point. Haven't seen much of that from Berdych in a long time. Another fine return by Murray brings up another break point, but can only clobber the second serve into the net. An ace carries Berdych to advantage. Only his third of the match. Berdych finally scrambles over the line, but he is staring down the barrel here.

MURRAY 3-0 - Another game ticked off by Murray in his march to this final. Doesn't get much better for the Scotsman than this. Has got this match in the palm of his hands. Has Berdych got anything left in the tank? Looks unlikely. Berdych utterly impotent.

BREAK MURRAY 2-0 - Another game goes to a fifth break point which Murray takes to break him in this fourth set. Looks like good night and good luck. Unless there is a complete collapse or the rains come to rescue Berdych, this match is over folks. Murray just providing so much good rubbish in the wind that his opponent can't handle. The power game has been dismantled and Berdych has no alternative.

MURRAY 1-0 - Another hold for Murray at the outset of this set. Taken to deuce, but Muzza is not for buckling here. A tornado just missed Flushing Meadows earlier on, but Berdych is having to battle his own mental storms. The error count now up to 46 from the Czech in this wind. Cutting a forlorn figure.

MURRAY 6-1 - Berdych forced to fend off another break and set point with a well directed serve and winning volley from the middle of the court. Murray's return has also been impressive today. A lame forehand from deep sees the ball come back off the wrong side of the tape. The set point keep coming and Murray gets the job done on his fifth set point as Berdych drills another forehand long. Murray simply toying with his opponent here.

MURRAY 5-1 - Berdych not hitting through the ball in the wind as he comes up with another pitiful response in dropping another game to love. The Czech player almost like a struggling golfer in the wind. Ball flying off his racket at all angles and goodness knows where it is going to land. The power game collapsing in these conditions.

MURRAY 4-1 - News to bring you of another success for Britain in New York today as Liam Broady reaches the boys's singles final with a 6-1 6-1 win over the Japanese eighth seed Kaichi Uchida. He will face Canadian second seed Filip Peliwo in the final after his 6-4 6-0 win over Yoshihito Nishioka. Meanwhile, Berdych avoids a bagel in New York by holding serve there.

MURRAY 4-0 - Murray going through this third set and Berdych like a dose of salts. It doesn't look like it is going to happen for the Czech player today unless he can somehow get out of this mindset. Missing all sorts of shots now. Murray holds again to love. Two games away from a 2-1 lead in the match.

BREAK MURRAY 3-0 - The double break for the Scot, who is relishing this match now. Murray pushing Berdych all the way here as he converts a winner down the line on the backhand side from the volley by his opponent. More frustration for Berdych as he overhits an approach shot. Break point for Murray as that sliced backhand leaves Berdych all over the place. He is broken for a second time in the third set and has lost the plot. Murray's backhand guided by radar in the wind. Class starting to tell.

MURRAY 2-0 - Berdych doesn't seem to be wanting to be there. His game is a pale shadow of the one that accounted for Roger Federer. One gets the feeling Murray is not far from making the decisive push in this match. If he can continue to excel on the backhand side, there is only going to be one winner of this match. And it isn't Berdych. Another love game.

BREAK MURRAY 1-0 - Berdych throwing in another error-strewn game. Clearly unhappy with the windy conditions as the Czech player is broken to love. Berdych has lost his concentration as he continues to bleed errors. Berdych has made 34 unforced errors with Murray making less than half that at 15.