I didn't expect this one to still be going at this point considering how quickly Haddad Maia breezed through the first set.

That break in play really disrupted her. Confidence and momentum will now be with Navarro.

It gets worse for Haddad Maia as she sends her return long before Navarro serves to seal the second set.

We're all square at one set each.

Jess Anderson
BBC Sport at Queen's

Oh wow. Two double faults. Ouch.

Nerves creeping in for Haddad Maia?

Jess Anderson
BBC Sport at Queen's

A brief pause in play as someone in the crowd was tended to by the medics.

Thankfully they got up and walked away and looked to be doing OK.

It’s a hot one for sure, particularly when you’ve been sat in it for over two hours.

A bad resumption for Haddad Maia as Navarro takes the first point as play resumes before the Brazilian double faults twice and it is 5-4 to Navarro.

Play is getting back under way.

We're hearing that the person being attended to is sitting up and talking, so hopefully all okay.

It is really hot now and the action on Centre Court has been going on for over two hours.

Play is paused because there appears to be an issue with someone in the crowd. Looks like medics have been called.

Fantastic stuff from Navarro as she has Haddad Maia stretching all over the back of court in a rally to claw back a point, but the next rally goes Haddad Maia as Navarro's lofted return drops out.

A rally ends with Navarro sweeping a forehand effort wide before Haddad Maia takes the next point to lead 3-1.

Another little fist pump by Haddad Maia as she takes the first point of the tiebreak but then sends her return from Navarro's serve into the net and it is 1-1.

Navarro gets a bit lucky as her forehand return clips the net and drops over but takes full advantage by taking the next point.

Tiebreak.

But the next two points go Haddad Maia's way and it is deuce.

Navarro has her hands on her knees, has she let the opportunity to keep this alive slip away?

Haddad Maia takes the first point of the game as she looks to avoid the tiebreak but Navarro takes control, smashing a return out of her opponent's reach before Haddad Maia's backhand hits the net.

Navarro's accuracy has improved and she is finding the limits of the court and a shot down the line has too much for Haddad Maia. 40-30.

A swift and pretty comfortable hold by Haddad Maia.

After a breezy first set the Brazilian is having to battle all the way in this one.

But once again Navarro battles back and a brilliant backhand return lands just the right side the line to seal the hold.

A frustrating one for Navarro as she leads 40-30 but puts too much on a return and it is deuce.

The next point sees the pair engage in a rally, Haddad Maia missing the opportunity to smash a lofted return but then Navarro sends a backhand shot down just wide.

That prompts a few groans from the crowd as Haddad Maia has the opportunity for a break.

This will be quite gruelling now for both players.

It is 24C and they've been on court for approaching two hours with little to separate them in this second set.

Another strong response by Haddad Maia to just temper her opponents momentum as she holds to love.