I'm a little surprised what caused Tottenham to experience a decline in performance, losing 2-1 to Newcastle was really beyond prediction. I bet for them in this match but it's really unlucky. MU and Chelsea's points are getting closer to them, there is a possibility that their position will be shifted if they continue to lose.
Tottenham should have been able to beat Newcastle but maybe there was a movement that made Tottenham's defense weak and read by the coach from Newcastle so they took advantage of that to score the second goal, Newcastle had not many chances but they managed to take advantage of it and get a win against a great club like Tottenham.
The goalkeeper's mistake was the cause of the first goal and it lifted Newcastle's mentality, and the second goal the defender's mistake was also again the goalkeeper's role in this goal, but I think the second half would have been different if it hadn't rained, I think Tottenham could have make draw if it hadn't rained, but this big win for Newcastle makes them now in position 4 very different view from last season.