BBC Sport's Matthew Kenyon in Mongomo

"The pitch in Mongomo is beginning to look its age... ie young. That bobble which forced Mame Biram Diouf into an embarrassing air shot - a couple of large divots in the penalty area in front of me. They didn't let any of the teams train here yesterday (as they should normally be allowed to do). And I counted 13 people at half time tamping down and repairing. Still not disastrous by any means - given the circumstances."

South Africa goalscorer Oupa Manyisa is off. Shakes Mashaba gives a 20-minute run-out to Reneilwe Letsholonyane.

South Africa skipper Dean Furman tries his luck from range but his shot trundles innocuously wide.

South Africa are on the ropes here. Lamine Gassama does brilliantly to dig out a cross from the right and Mame Diouf flicks a header just wide.

Another heart-in-mouth moment for South Africa keeper Jackson Mabokgwane, who flaps at the cross and somehow manages to gather at the second time of asking. How Bafana Bafana miss Senzo Meyiwa.

Senegal suddenly look strong and purposeful now. Sadio Mane drives to the byeline and wins a corner. Into the final quarter - will we see a winner here?

Striker Bernard Parker enters the fray for South Africa, replacing Thuso Phala.

South Africa have a promising free-kick 25 yards out, but Oupa Manyisa steps up and smashes it over the wall.

Senegal came on strong in the final half-hour against Ghana. South Africa faded badly in the latter stages of their match against Algeria. Will we see a similar story tonight?

BBC Sport's Matthew Kenyon in Mongomo

"So the question now for South Africa is how they cope with conceding a goal after taking the lead. Against Algeria they imploded. But if they're to retain a real chance of making progress they need to compose themselves."

But Senegal are not to be denied a second time. Again a free-kick proves South Africa's undoing. The cross is hung up towards the back post, where no-one has tracked Kara Mbodji, who beats keeper Jackson Mabokgwane with a bullet header. Again question marks over the keeper, who had advanced off his line into no-man's land.

BBC Sport's Matthew Kenyon in Mongomo

"We've lost the big screen here in Mongomo. It flickered for a bit. Went green. Came back to life. Then went. It doesn't look like it's returning this evening. But why watch the screen when you have the action in front of you! (And it doesn't show replays)..."

Senegal hoist a free-kick deep to the back post, it's headed back across goal, South Africa keeper Jackson Mabokgwane fumbles and Sadio Mane stabs it into the empty net. But his joy is short-lived - the linesman's flag is up.

Senegal look nervy now - they know another goal for South Africa could put them in huge trouble. South Africa skipper Dean Furman applauds in encouragement - his side are in control at the moment.

That means everyone in this group is on three points now. It could not be tighter. Senegal's run of Afcon games without a clean sheet stretches to 13. They face Algeria in the final game - that could be a real humdinger, with a quarter-final place at stake.

Image source, Twitter

Demba Ba was left out of the Senegal squad for the tournament and wasn't happy. He's even angrier now...

Image source, AP

I ask, and Oupa Manyisa answers. Anele Ngcongca crosses low from the right, it misses everybody and comes to Manyisa at the far post who coolly slots his finish back across Bouna Coundoul. Can South Africa hold onto their lead this time?

We're back in action in Mongomo. Let's have a few goals, shall we?

I've been on Afcon live text duty since Wednesday, and six games later, I still haven't seen a single first-half goal. The good news is that the second halves have tended to be more entertaining - let's hope that's the case again here.