Tottenham this season has a big chance to win the Premier League trophy but unfortunately, Tottenham does not have substitute players who have good quality either. So ya, when many of Tottenham's key players couldn't play due to injuries and also received suspensions due to red cards. So Tottenham performance will also decline, because the second tier players cannot maintain good performance for Tottenham at this moment. So ya, it is natural that Tottenham is experiencing a decline in performance at this time, because Tottenham is experiencing problems that cannot be overcome quickly and well at this moment.
It takes more than a good start to the season to win the premier league, we saw and learnt that from last season where Arsenal had a very good start but fell short later on due to injury problems too. To win the premier league, in addition to a good start, a good first eleven players for games, there also have to be a second good options for the coach to choose from if anything happens to the first choices you have. Manchester City did not lack that last season, so where able to manage to the end. Tottenham will have problems in the coming weeks of the premier league.