Newcastle legend Alan Shearer says they have the rest of the Premier League worried after victory at Tottenham.
Shearer wrote for BBC Sport: "I really didn't expect Newcastle to be in the top four after 12 games and, although I'd love to be proved wrong, I don't think they will still be there come the end of the season.
"But, while I am being realistic about their chances of making the Champions League places, I am still enjoying seeing Eddie Howe's side up there, playing so well, and getting big results like they did at Tottenham on Sunday.
"Their 2-1 win was another example of how Newcastle are starting to upset some of the big boys - and they don't like it.
"It was a similar story when they went to Anfield in August. They were beaten in the end, by a 98th-minute winner, but they were really unlucky to lose and Liverpool were moaning and groaning about how they had, almost, seen the game out.
"It's a good sign, because it shows Newcastle are no longer a soft touch wherever they go - something Manchester United also found out at Old Trafford last week.
"People know things are different now. They know Newcastle are coming, and they know they mean business."