Andrew Castle
BBC tennis commentator on BBC Two

"I think what happened last night was a sporting aberration. Murray was dismissed by possibly the greatest player of all time, in full flow. Murray has played well in the last few weeks, but how's he going to compete with Nadal when he comes back, with Djokovic, and with Roger? At the age of 27, does he want to remodel his game? I think minor changes are necessary."

What should Murray do next and where does he need to improve? Can he challenge the top three next season? You can either tweet us your thoughts using the hashtag #bbctennis, text 81111 or visit theBBC Sport Facebook page. It'll be nice to hear from you.

Jose Mourinho was at the O2 last night to watch Federer gracefully progress to the semi-finals, and the Chelsea boss has some advice for Murray.

"There are some matches where we feel it's not our day and I think that applies to football and any other sport, even in tennis," said the Portuguese. , external

"But in all, pride, and play for the people that are behind him and even if he knows that it is very difficult to beat Roger tonight, give his best and sometimes a bad defeat is the beginning of many, many victories and hopefully next season will be a much better season for Andy."

Tim Henman
Former British number one on BBC Two

"Federer was exceptional, but Andy was given a thumping, it's not the way he would want to finish his season."

Talking of crushing defeats... "Exceptional" is how Andy Murray described Roger Federer's performance during the world number two's 6-0 6-1 thrashing of the British number one last night.

"It was the best he's ever played against me, but I was disappointed with my performance. There's no denying how much it hurts," says Murray in his latest BBC Sport column.

"This year has been testing and I've learned a lot along the way, it's just a shame to finish it with another very harsh lesson. I'm sure it will be a tough one to look back in the future."

Image source, Getty Images

Hello! Welcome to live text coverage of the last two ATP World Tour Finals round-robin matches, starting with Novak Djokovic's ding-dong with Tomas Berdych. If the rest of the week is a guide to how this afternoon's match will unfold we can expect one player (probably Djokovic) to crush the other (probably Berdych) in a straight-sets defeat, but funny things can happen at the O2.

One person's dream is another's nightmare. A week of annihilations and humiliations is about to come to an end but, worry not, there's will be more suffering and conquering before the week is out.

Image source, Getty Images