So, we're two and half days in and I think it's fair to say that this tournament hasn't really come to life. Let's hope Novak Djokovic and Stan Wawrinka can change all that tonight. Join us at 1945 for live text and radio coverage of the world number one against the Aussie Open champion. Catch you then.

Tim Henman
Former British number one on BBC Two

"That's two very disappointing matches for Cilic. He is 6 ft 6 ins with a big serve and he has lost four sets and only won six games. He's just not doing the basics right and he won't be a happy man."

The match stats don't make pretty reading for Cilic. He only won 61% of points on his first serve and 41% on second, compares with his opponent's 71% and 70%. His serve was broken four times in two sets and he only won 43 out of 106 points.

Nice line Tomas. That match lasted 74 minutes. Berdych is now 0-5 in opening matches in the World Tour Finals and 5-0 in second matches.

Tomas Berdych: "I was really trying to focus on my tennis and my game, trying to go point by point. I think today was more fighting and getting through. It's good to have a win and it always counts.

"It's not my first year. I have the experience of losing the first match in the past and I know how to come back. I think that was the biggest difference today.

Asked about facing Djokovic next, Berdych asks the crowd "Any tips? I will need some. I just want to try to bring my best tennis and we'll see what happens. I hope I can have a great match."

Talk of an early bath here, but have we spoken too soon? Berdych pushes a forehand into the tramlines to give Cilic a break point but snuffs it out with ace number five. Another one is saves, but two points later we're at match point. And the contest ends, somewhat fittingly, with a Cilic backhand into the net.

Image source, Getty Images

Cilic is officially his own worst enemy. A dreadful drop shot and a powerpuff approach earns Berdych three virtual match points. Cilic saves one with possibly his best shot of the match, but cannot sustain that level and nets to leave Berdych on the brink.

From 30-30, Cilic fails to get a ball back into play and Berdych is closing in on the match now. Goran Ivanesevic has had enough. He looks like a father whose son has just been sent off for diving in an under-11s match.

David Law
BBC Radio 5 live sports extra commentator

"This is wild tennis at the moment for Marin Cilic - he is all over the place at the moment. This must be a nightmare if you are a professional athlete, surrounded by this sort of crowd, and it is just not working - you must want the ground to swallow you up.

"You can see the irritation and strain in his features after every point. Yet there's a calmness and serenity about Berdych."

Andrew Mark Spence:, external "Despite this performance in this match, I see Cilic winning a second Slam in '15...possibly Wimbledon."

Sam Hedge:, external "London should permanently host this event. The O2 arena has a unique atmosphere."

James Donald:, external "Both of these players are trying to hit themselves into form. Expecting to see a lot of unforced errors but also some huge shots."

Cilic certainly has plenty of fans in the O2, judging by the number of Croatia football shirts in the crowd. But can he give them something to cheer about? Berdych plays a superb point to level up at 30-30, then lands a backhand right on the line to gain a break point. Another horrible rushed backhand from Cilic gives Berdych the game.

Thank goodness Tim Henman and Andrew Castle have healthy heads of hair because they are tearing it out in exasperation over Cilic's performance here. He opens up two break points but slops a second serve return into the net. Berdych gets back to deuce, and puts the game away thanks to another backhand howler from Cilic.

John McEnerney:, external This may go the distance once MC finds his rhythm both big hitters plus Goran is there in MC's corner! Please 3 sets lads!

Andrew Mark Spence:, external "Despite this performance in this match, I see Cilic winning a second Slam in '15...possibly Wimbledon."

Sam Hedge:, external "London should permanently host this event. The O2 arena has a unique atmosphere."

James Donald:, external "Both of these players are trying to hit themselves into form. Expecting to see a lot of unforced errors but also some huge shots."

Cilic just can't find any consistency out there. from 40-0 he lets Berdych back in the game with a couple of unforced errors, but stumbles over the line when the Czech nets a backhand. Coach Goran nods approvingly.

Tim Henman
former British number one on BBC Two

Image source, Getty Images

"Berdych did a good job in the first set. He kept his first serve percentage high and moved forward when he got the chance. He'll be looking for more of the same. Whereas Cilic has to cut those unforced errors out and look to get on the offensive in these points when he's facing the serve."

Berdych is riding the wave now, hitting the spot with his serves and keeping his opponent guessing. He holds to 15 with a fizzer tot he corner that wrong-foots the big Croat.

Image source, Getty Images

The debate around who Tomas Berdych will bring in to his coaching set-up intensified after his first round battering.

The Czech said he wants to add somebody with a "new and different experience" - his current coach Tomas Krupa, who spent two months inside the top 300 in late 1995, helped Berdych to the Wimbledon Final in 2010.

BBC commentator Andrew Castle wonders if that would be "hard to take" for Krupa, while former British number one Tim Henman says: "It is an interesting concept that has really come into the game in the last few years - talk of these 'super coaches'.

"We thought it might be [eight times Grand Slam singles title winner] Ivan Lendl, but he said no. It will be intriguing to see who it is."

Berdych doesn't waste any time in snaffling his opportunity. Two set points: the first is missed, the second taken when a Cilic forehand misses the line by a hair's breadth. 1-0 to the Czech.

Hold on, is this the Cilic charge? A heavily top-spun approach and a brutal overhead give him an opening at 0-30 on the Berdych serve. Then another dart to the net and a backhand volley sets up two break points. Berdych saves the first with a brilliant backhand winner and the second when Cilic lets himself down with a loopy drive past the baseline. There's no second chance for Cilic as Berdych moves to within one game of the set.

Tim Henman
former British number one on BBC Two

Image source, Getty Images

"There's been 44 points but only six winners - that's 38 points ending in either an error or a forced error. I'm not suggesting they keep the ball in the middle of court and don't miss, but when there's that many mistakes you've got to be aware of it. They've got to get rid of them."