Watch a drop shot executed with remarkable finesse by British wildcard entry Katie Boulter.

No dice on the McHale serve but Boulter takes no time at all on her own serve to wrap up the first set, winning that game to love.

The pick of the points a deft series of volleys at the net.

Martin Klizan is in deep conversation with his physio. He looks like he's about to cry (Klizan, not the physio. That would be weird).

Surprisingly, the Slovakian is back on the court now and feels able to continue.

We go again.

Brits galore at the minute as James Ward - no relation to Alex - gets going against Marcos Baghdatis on court 18.

We're on serve at the minute, both players just sizing each other up.

Whilst we're waiting for Klizan and Djokovic to resume, here are the highlights from world number Angelique Kerber's win over American qualifier Irina Falconi.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

Klizan can't call his physio because it's an existing injury. I believe that's the rule, but it's not difficult for players to suddenly develop something different.

The umpire is on the phone after chatting with Martin Klizan, and the physio is on his way over.

The world number 47 is holding his leg and looks quite uncomfortable.

Garbine Muguruza is through to the second round after a 6-2 6-4 win over Ekaterina Alexandrova on court three. Men's tenth seed Alexander Zverev is just about to get his first match going on the same court.

On court two, Agnieszka Radwanska is in action, while Jack Sock is about to start on court eight.

And there's three Brits in action - Katie Boulter, James Ward and Brydan Klein are all in play

You've got viewing options from 15 courts over here.

Djokovic is serving for the set but he's not serving at 100%. He's clocked up another double fault.

Oh, no, hang on. He's won the set with an ace. I take it back.

Brit watch alert part two!

Katie Boulter is firmly in charge of the first set against American Christian McHale as she needs just one more game to take it.

McHale to serve, though.

Image source, PA

Gael Monfils snatches a point from Germany's Daniel Brand with an impressive hot dog winner.

After a couple of deuces, Klizan shanks a backhand well wide and hands Djokovic the advantage.

Klizan forehands wide again and the break goes to the three-time champion.

Brit watch alert!

Brydan Klein is out on court 16, facing Japan's Yuichi Sugita.

It's on serve in the first but Klein has a chance to break in the sixth game. Setting up a break point with a wonderful reaching forehand as Sugita looked to pass.

He can't convert though and we're back to deuce before Klein finds net.

Sugita does convert and it's level at 3-3.

A delightful backhand winner from Djokovic snatches a point from Klizan's serve. The world number 47 lands a double fault as Djokovic edges ahead.

And the Serb drops an excellent forehand return to earn two break points.

They both go amiss, though. To deuce we go...

Novak Djokovic shows a bit of bite and holds to love, adding two aces to his stats pack.

Maybe the Serbian screws are slowly turning now.

Klizan is sweating profusely already but Novak Djokovic isn't putting him under too much strain just yet.

Djokovic's forehand is ruled long, despite a challenge from the Serb, and Klizan holds again.

Mike: Kerber is the weakest world no 1 in women's tennis for years. Will lose it next week.

Annie G: Brilliant @DavidFerrer87, external what a win! Vamos!!

Chanice Hird: Del Po mate, you don't do an in-between the leg shot when it's match point!

Watch Juan Martin del Potro finally seal victory with an emphatic winner after Thanasi Kokkinakis saves six match points.

John McEnroe
Three-time Wimbledon singles champion on BBC TV

I'd like to make a proposal early here, because this might come up later on. Players that aren't 100 per cent, like Klizan who is clearly not, you offer them half the prize money. I'm not the first guy to come up with this.

You don't want guys just to show up for the pay cheque, but you understand this is meaningful to them so you give them half of it.

If I was Federer and Dolgopolov, I'd be getting ready as you may be coming on soon.

Martin Klizan is keeping Hawkeye busy with line-calls, and he's getting more and more rattled every time he puts his hand up to make a challenge.

Djokovic outsmarts his opponent with a forehand down the line and then takes the game with another ace.

We're ticking along nicely here.