The frustration's kicking in for Kyrgios, who chucks his racquet to the ground after sending a forehand wide.

Kyrgios holds but now has to face a service game from Humbert as the 21st seed looks to finish off the third set.

Humbert, after a brilliant forehand on the run that stunned everyone by making the corner, is at deuce on the Kyrgios serve, needing two points to win the set.

Humbert isn't letting Kyrgios back in here.

The Australian battles to 40-30 but Humbert continues to stand firm on serve and moves one game away from the third set. Impressive.

Kyrgios needs to find a response quickly before this set disappears from sight.

He starts well, moving to 40-0 on serve before Humbert places a winner that wrong-foots the Australian - and he pulls back another point but Kyrgios is able to hold.

A good hold. Humbert keeps calm under pressure and sees out the game to move 4-1 ahead in the third set.

Kyrgios hits into the net to lose the first break point opportunity, an a powerful serve down the centre by Humbert rescues the second. Deuce.

Now then, can Kyrgios break back and get himself on level terms in this set?

A forehand winner down the line makes it 15-30 on Humbert's serve.

And the Frenchman goes wide! Two break points for Kyrgios...

"This is slow," Kyrgios tells the camera as he takes a drinks break.

The Australian is clearly unhappy with the surface on Court One.

"Water it. Make it a grass court again," he adds.

Nonetheless, he returns to the court and registers a hold to love to trail 3-1 in the third.

An unforced error from Humbert hauls Kyrgios to 30-30 on the Frenchman's serve from 30-0 down as he seeks an immediate response.

Now then! Humbert just manages to clip the line with an awkwardly taken smash to avoid handing Kyrgios a break point opportunity, before seeing out the hold.

All that good work to take the game to deuce comes to nothing for Kyrgios.

Humbert takes his fourth break point opportunity of the game to take a 2-0 lead in the third set and Kyrgios must play catch up now.

Humbert beats his way through the Kyrgios serve to set up three break points, but the Australian battles back to rescue all three!

Nerves of steel. We go to deuce.

An important hold for Humbert there at the start of this third set, but he was pushed all the way.

Great court coverage from Kyrgios as Humbert sends him running, but the Frenchman finds the corner and the Australian can't get there and we're at deuce.

Break point for Kyrgios in the first game of the third set, at one set each.

Nick Kyrgios takes the opening two points off the Humbert serve right at the beginning of the third set and we're now at deuce.

While British number one Dan Evans reached the second round of Wimbledon with a straight-set win over Feliciano Lopez on Tuesday, compatriots Francesca Jones, Harriet Dart and Jay Clarke could not join him.

Jones, making her Wimbledon debut, lost to American 20th seed Coco Gauff 7-5 6-4.

Dart bowed out early too with a 6-1 6-3 loss to Elise Mertens, and Clarke was beaten 6-3 3-6 7-6 (7-5) 6-2 by Belarusian Egor Gerasimov.

Cameron Norrie's game against Lucas Pouille was been suspended this evening, with the Frenchman a set ahead - 7-6 (8-6).

A shake of the head from Kyrgios and a fist pump from Humbert as he flicks a forehand winner away and that's a set apiece. You'd be brave to bet on the winner of this one.

But a double fault from Kyrgios gives Humbert a third set point.

Kyrgios takes some pace off the serve, the return is long and the Australian screams out at saving two set points. Deuce.