Time to finish, but we'll soon have a courteous report from Kevin Mitchell. Thanks for joining me. Byeee!
Some more words from Federer, which is positively Zen compared to the frustrated figure that lost to Nishikori:
"I felt pretty fast that I was excited, I had the right kind of nerves. The full format of round-robin is quite unusual, now I feel like it's winning or going out.
I could feel the rhythm, feeling the flow in the legs, I was not stirred. I found my game much faster. You feel like you have more time, which is good for me. "
Federer's pass to the semifinals is still far from secure – he leads to Kevin Anderson next, and with Nishikori and Thiem playing each other, he will need to win to give himself a chance to progress. That should be a much tougher proposition than Thiem was tonight.
Roger speaks! "Feel good, I'm very happy to show you a reaction. I'm not used to losing and then playing again, it was a good test.
"Against Kei, it was four, we all played very badly, and I felt pretty negative. This was a bit disappointing, and Kei played better at the end.
"Today you play a lot better and it is always a privilege to play here in London and I tried to remember that."
Roger Federer hits Dominic Thiem 6-2, 6-3!
It's all over when Thiem sends a wide volley – his 34th unforced error of the match. He was very far from his game but Federer did his job and has his first win in the tournament.
Second set: Thiem 2-6, 3-5 * Federer (* indicates next server) Will Thiem does Federer serve him? It admits a defeat of Federer in a less than ideal start, then produces an ordered shot of half-volley. Federer shoots his next round only wide and unsuccessful challenges. Another thing about Thiem makes it a total of 30, and is trapped by a short return that falls. Point of coincidence … saved when Thiem stays firm at the next concentration. Federer does not let that happen again, dominating the following for a second point of play …
Second set: Thiem 2-6, * 3-5 Federer (* indicates next server) Federer does not need to leave second-hand, firing three aces and winning the only rally when Thiem mishits, throwing the ball into the stands. Federer has, say, that it seemed very strong to serve tonight.
Second set: Thiem 2-6, 3-4 * Federer (* indicates next server) Finally, a convenient game service for Thiem while he loves it. He is running out of time to make a dent in his opponent's service, however.
Second set: Thiem 2-6, * 2-4 Federer (* indicates the next server) Thiem played some good things between the mistakes: he is granted to Federer with a volley on the net here. Unfortunately you have 40-0, Federer's service is very strong, but he still has not faced a breaking point.
Second set: Thiem 2-6, 2-3 * Federer (* indicates the next server) Thiem shows his eyes in his ability in this game, particularly with a forehand instead of which Federer can not approach. At 40-15, he reaches the speed after the Federer's chip shot bounces to the surface. Thiem falls to the deuce and seems ready to throw the towel, but finds the bottom line with a maneuver and hangs in his service.
Second set: Thiem 2-6, * 1-3 Federer (* indicates the next server) The return of Thiem clips to the network, giving him an opportunity, but he gets tired on the net and disappears, shaking his head. That is the only opportunity he receives on a routine wait, sealed with a feathery shot.
Second set: Thiem 2-6, 1-2 * Federer (* indicates the next server) All singles meetings so far in London have won in direct sets, and it would be a surprise that this does not happen here too. Thiem, at least, shows a fight here, moving 40-15 onwards with a cross-courter and finding a great second service to endure.
Second set: Thiem 2-6, * 0-2 Federer (* indicates the next server) Federer looks for a good nick, although it is not proven there. She runs towards a service to love.
Second set: Thiem 2-6, 0-1 * Federer (* indicates the next server) Thiem tried to be aggressive, but he did not have the accuracy of taking it away. He tries to enter a land game with Federer here, but he is not happy, Federer ping it back effortlessly. Thiem is losing his heart and, rather, away from his service.
Federer wins the first set!
First set: Thiem 2-6 * Federer (* indicates the next server) Federer looks for serving the set, and it's hard to see Thiem put too much resistance. As I write this, he mixes a backhand by clicking the line. It's 30-15, according to service, and Thiem judges an excuse for a return beyond the base line. The Fed rescues it with ace.
Some names of football star in the crowd tonight: Real Madrid, Toni Kroos, Bournemouth goalkeeper, Asmir Begovic, and West Ham manager Manuel Pellegrini. Federer is in the right age range; maybe we are weighing a one-year business.
First set: Thiem 2-5 * Federer (* indicates next server) Thiem does not play well enough to move away a Federer of up to 50%. he manages an attempt to overcome the network, and adds a double fault to his non-forced error. Another resting point for Federer, taken as Thiem judges badly a little more uncomfortable volleyball.
First set: Thiem * 2-4 Federer (* indicates the next server) Thiem can feel better after getting a second game on the board, but can he make the Federer service on the road? Not here – Federer takes control with a bright and sharp biceps fall with an ace.
First set: Thiem 2-3 * Federer (* indicates the next server) Thiem at a point of bothering again, unforeseen mistakes stacking while deploying 15-30 from behind. In the second service, shout a rally and then enter the network to bring the next. However, he exceeds another forehand and he is deuce. Federer delivers an advantage with a return that flies wide and Thiem.
First set: Thiem * 1-3 Federer (* indicates the next server) The return of the service is something of weakness for Thiem, and fights here when Federer reaches 40-15. An ace ends and goes well.
First set: Thiem 1-2 * Federer (* indicates the next server) Another scumbag of an opportunity for Federer at 15-30, but beating an adversary. There are already more than a dozen unforced errors: they were scanty things. Thiem gets the best of the next rally, but networks like Federer overtake him. Breaking point, taken as Thiem overhits a shot down the line.
"Maybe Federer had a new deal with the bands company – he has to use it for a longer period," suggests Andrew Benton. "And 95% of Federer can beat Thiem with ease".
True, but Federer is 95%? Can you beat Thiem at 80%? The answer is: probably.
First set: Thiem * 1-1 Federer (* indicates the next server) Federer tries to find his rhythm to the service, but clear a shot at the grid at 30-15. A pair of bundles first serves safely the first wait.
First set: Thiem 1-0 * Federer (* indicates the next server) Thiem groups a flight on the net to slip from 0 to 30 back, but concentrates with a couple of punishments. Thiem, then, goes on for a long time, ignoring a breakpoint, but rescind it with a wide service, and picks up a victor on a cross. Thiem loses a couple of possibilities to close the game, but a fast-paced and fast-paced serve.
Here we go, Thiem serving first in front of a plagued house.
Federer wins the shot and chooses to receive first, which was his usual tactic. He kept his sweatshoot on top for heating, leading to more speculation of Rusedski and with which he did not feel 100%.
Players are going to the track. Federer, predictably, gets much ovation. The feedback team thinks it looks nervous: I doubt.
Here's Roger! "I just played better, to be a bit more positive. I am very excited to have an opportunity. Indoor tennis, I have to be aggressive and play to win."
Thiem has the rare distinction of having a winning record against Federer, for two games at one. They did not play since 2016.
There is no Andy Murray here this year, of course, but his brother, Jamie, arrived at the double semifinals with his partner, Bruno Soares. 6-4, 6-3 winners against the Colombian duo Juan Sebastian Cabal and Robert Farah have just emerged. They are in the semifinals for the third consecutive year, although they have never reached the final.
Hello The round-robin stages in these end-of-season issues can turn into complex and confusing issues, but the equation of Roger Federer is very simple. You must defeat Dominic Thiem or face the phase of elimination in the group at the End of the Tour World, for the first time since being reissued and transferred to London in 2009.
His loss of openness to Kei Nishikori left him in a precarious position in his group, while Thiem also fell into defeat with Kevin Anderson. Federer is still a favorite favorite to win tonight, but Nishikori's performance today, a terrible 6-0, 6-1 for Anderson, raises a question about Federer's form. The move begins at 8 o'clock, GMT.