Dan James is off, Rabbi Matondo comes on to win cap number six.

James played much better tonight, but was wound up after that booking.

Image source, Football Association of Wales

Harry Wilson tests Nikolay Mihaylov with a freekick from 30-yards, but he pushes it away. Great hit.

Dimitar Karabelyov is booked for dragging back Ethan Ampadu.

"Be (rude word) sensible," Ryan Giggs bellows at his players.

It's a family blog.

Image source, Huw Evans Picture Agency

This game is reaching boiling point.

Daniel James is booked for a foul and it leads to a bit of handbags between the two sides.

Harry Wilson is punished for jumping into someone.

Neco Williams is the architect and it's a really good chance for a dream moment for Rhys Norrington-Davies on his debut, but he smashes the ball over.

Lovely play by Williams.

Aleksandar Tsvetkov replaced Kristiyan Malinov at the break for the hosts.

We are back under way.

I kicked off this blog telling you that Wales were top of the group....

They were then, they aren't now.

Finland's 1-0 win over the Republic of Ireland has knocked them off their perch, at least temporarily.

Image source, Getty Images

Dafydd Pritchard
BBC Sport Wales

Wow, Group B4 in the Nations League really is the group of the great entertainers, isn't it?

Republic of Ireland, scorers of two goals in eight matches over the course of two Nations League campaigns.

Bulgaria and Wales, scorers of one goal and two goals respectively in their three and a half games of this campaign.

Who had money on another 0-0?

There we are then.

Lots to like from Wales, but no goals.

Put the kettle on, feed the dog, read the BBC Sport website, we've got a few minutes.

We will have one added minute at the end of the first half.

Dafydd Pritchard
BBC Sport Wales

Neco Williams and Rhys Norrington-Davies have covered an enormous amount of ground on Wales' flanks so far.

The wing-backs are stretching the game for the visitors, creating space for the front three.

But Wales are lacking a cutting edge in attack. They've yet to really trouble the Bulgarian defence.

Some encouraging signs for Ryan Giggs but he will want to see more purpose and incisiveness from his team when they push forward.

Still level as we approach half time but I think you'd say there have been more positives than negatives for Wales.

System has worked well, they just lack a killer pass, but remember they are missing arguably their three most important attacking players.

The past two posts, as self indulgent as they come, should indicate the intensity has rather slipped in this game.

Plenty of Wales possession, but not much penetration.

See also; watching Kwarme Ampadu playing for Newport County.

You know that thing that makes you feel 100-years old?

I just had it when I realised Nikolay Mihaylov is Borislav Mihaylov's son.

I used to watch Borislav Mihaylov play for Reading at Elm Park in the 90s.

Kevin Ratcliffe
Former Wales captain on BBC Radio Wales

We've had lots of possession but the final ball needs to be better.

We are 30 minutes in.

So... in the interest of honesty.... in my life I've seen about half an hour of Rhys Norrington-Davies. He looks decent to me.

A very comfortable debut so far.