Liam Manning joked that he had aged ten years watching his City team defend for their lives to beat impressive Sunderland in the Sky Bet Championship.

Tommy Conway’s 20th-minute penalty, after Taylor Gardner-Hickman was tripped by Sunderland goalkeeper Anthony Patterson, proved enough to settle a hugely competitive game at Ashton Gate.

Play-off hopefuls Sunderland dominated for long periods of the second half but could find no way past inspired City keeper Max O’Leary, who made brilliant saves to keep out two Luke O’Nien headers and one from substitute Jobe Bellingham.

Head coach Manning said: “Max was outstanding, not just with his saves but the composure he showed under pressure.

“I’ve aged 10 years watching the game but I’m delighted for the lads because of the togetherness and spirit they showed.

“We have played better, but despite defending for long periods we were always a threat and had chances to extend the lead.

“I have a terrific group of players and, while there is room for them to develop, they lack nothing in effort.

“In a tough league like the Championship, you cannot afford to get too high when you win or too down when you lose.

“What the fans want to see above all is a team putting bodies on the line and giving 100 per cent. There could be no complaints on that score today.

“The commitment to block shots and stop crosses was fantastic. It had to be because Sunderland played well, particularly in the second half.

“Still, I felt we were always capable of catching them on the break. Anis Mehmeti has hit a post and Harry Cornick was through on goal after going on as a substitute.”

Sunderland were caught playing out from the back for the penalty, having survived a previous scare doing the same, and interim coach Mike Dodds was understandably frustrated.

“My anger is mainly directed at a mad 15 minutes in the first half when we invited Bristol City to take the lead,” he said.

“Apart from the penalty incident, there were three or four other lapses that went unpunished and it gave them impetus.

“If I had seen that sort of sloppiness in training, the players concerned wouldn’t have been in the team.

“I haven’t seen it from the team before and don’t want to again. There were words spoken about it at half-time.

“We completely controlled the second half and created chances without taking them. I can live with that, but what happened in the first half was unacceptable.

“Their keeper has made some good saves, but at times our finishing could have been better.”

Of his own situation, Dodds added: “The club have been great in communicating with me and the ball is firmly in their court over what happens next.

“Whoever becomes the next head coach will inherit a fantastic dressing room at a club definitely on the up.”

The hosts hit a post in the first half through Mehmeti’s curling shot but had to survive several Sunderland penalty appeals during a backs-to-the-wall second half.

Playing towards their 2,600 travelling fans, the visitors applied constant pressure, only to be denied by O’Leary and some committed last-ditch defending.

Cornick had a great chance to settle the outcome when breaking clear, but the hosts were hanging on at the end before celebrating three hard-earned points.