The Magpies were in danger of the drop last season but climbed out of the relegation zone in the second half of the season to finish 13th under Rafa Benitez, who left the club at the close season.
"We could not score all the chances we had; they scored the two chances they had".
This season has not gone according to plan for the City manager as he attempted to match the unprecedented efforts of past year when he swept all three domestic titles with the club.
"Of course when De Bruyne hits that one in, a wonder goal, you think with eight minutes to go, that's typical because of that little bit of quality they have got, which certainly De Bruyne's got". If I feel that is not worse, we will see with the club what is the best way.
"In that period (with Barcelona) I was younger and now I'm more experienced". We moved the ball well, we found spaces outside especially with the players inside, and we arrived in front of goal many, many times.
'I trust the club a lot and they trust me.
"The results and our passion and what we see and decide".
Manchester City will then travel to Burnley in their next Premier League game on Tuesday night, before a crunch home clash against Manchester United next weekend.
Guardiola said it was an honour that other clubs wanted his staff and he would not stand in their way. The City manager's current deal runs out in 18 months at the end of what would be his fifth year in the Etihad dugout.
"I saw they were sitting deep and I asked [Christian] Atsu to cut the ball back to me, it was always drifting away from the keeper", Shelvey said of his strike.
Guardiola, whose side won their last 14 games last season to clinch the Premier League crown after a 2-1 defeat on Tyneside said: "Last season, we played badly, we played poorer than today".
"It is not as simple as I want to extend".
"I'm comfortable working with this club".