An powerful cross-court thwack from Marin Cilic as he sends Novak Djokovic scampering in desperate search of a return which is unable to make.

However, a lengthy baseline rally and Cilic is long with his return. A mini break for Djokovic.

Novak Djokovic first on the board with his serve, as Marin Cilic whacks his return beyond the baseline.

Novak Djokovic looks at the turf in puzzlement after he slips on the first point during a Marin Cilic service game. Unlike the previous set, Marin Cilic holds his serve in the crucial 12th game to force a tie-break.

Novak Djokovic has lost jus twot points on his second serve in this set. He is serving beautifully. From 40-15 however, Marin Cilic hangs in the game with a sliced backhand down the line.

The Croa thent makes a rare advance to the net but overcooks a volley beyond the baseline to give Djokovic the game.

An important service game to follow.

A couple of towering serves from Marin Cilic and he holds his serve. Steely determination from the Croat.

Image source, Reuters

A brilliant cross-court return from Novak Djokovic having earlier bunted the ball back in an unorthdox way to a body serve from Marin Cilic. 15-30.

A couple points later and it is 30-40 with a chance of a break for Novak Djokovic.

However, a Cilic ace makes it deuce.

That being said, Novak Djokovic's service game has been smoother than Barry White in silk pyjamas today. He drops just the one point to edge ahead.

A big few games for Marin Cilic coming up.

Marin Cilic is regaining his confidence here. He shows great aggression to close out another swift service game. He needs to win the big moments when they come his way, though.

Remember I said Kevin Keegan wouldn't be much use in the slips on a cricket field? Well here's the video evidence of his drop in the stands earlier.

It wasn't the easiest of chances, but fine leg please Mighty Mouse.

Marin Cilic's serve is speed, but Novak Djokovic's is lazer-like with his accuracy. A rapid service game goes the way of the Serb.

Everything going with serve so far in this set.

Image source, EPA

Marin Cilic with a superb backhand winner which he arrows down the line to make it 30-15 in the sixth game. The Croat produces an ace down the centre of the court before finishing with another brutal serve which gives Novak Djokovic no chance.

All square.

Image source, Getty Images

Here's some interesting news - Roger Federer has suffered a surprise defeat to Borna Coric in the final of the Halle Open and will lose his world number one ranking.

Croatia's Coric, 21, won 7-6 (8-6) 3-6 6-2 to end the Wimbledon champion's run of 20 consecutive victories on grass.

Federer, 36, was bidding to win the event for the 10th time and secure his 99th career title heading into Wimbledon next week.

The Swiss' defeat means Rafael Nadal will take over as world number one.

Champagne tennis! Novak Djokovic covers every blade of glass to win an enthralling rally at 30-15 which sees him ending up on his back side.

The Serb then serves an ace to clinch the game.

A brutal forehand down the line from Marin Cilic sees him hold serve. The Croat heads to his seat and unwraps the cellophane from a new racquet. He looks to have regained some confidence. Could this be the start of a fightback?

John Lloyd
Former GB Davis Cup captain on BBC Two

You would think someone like Djokovic with so much experience and so many Grand Slams would not be nervous but he's admitted to that and has been very honest and surprisingly so for a top sportsman.

He obviously wants to get back to being world number one or he wouldn't be out there. There's still a way to go but he's improving.

There are little bits missing, and little doubts has now and again, but it's great to have him back.

Kevin Keegan, in a crisp white shirt, is chuckling away in the stands. The source of the amusement for the former Newcastle and England manager was his failed attempt to catch an errant ball which flew into thew stands.

Not sure Mighty Mouse would be of much use in the slips.

Back on the court and Novak Djokovic has all the momentum as he cruises through another service game.

A vital hold for Marin Cilic as he wins after a 10-minute service game.

Jonathan M Smith: Jeez this is edge of the seat stuff!

Novak Djokovic has a chance to break Marin Cilic's serve but he fizzes a return just over the baseline. Back to deuce. Cilic is having to graft for this game.