As per my prediction that Chelsea will be able to beat Southampton with a landslide score, the defeat in the last two matches has indeed made it very difficult for Chelsea to get points this week, at least Chelsea can maintain its position above the Champions League zone, at least that has been successfully done by Chelsea and focus on the next match.
We have seen Chelsea's poor performance against Brighton and Aston Villa. Chelsea have lost two consecutive matches. Southampton was a very weak opponent. The victory in this match was also very necessary for Chelsea. Chelsea was able to win this home match by dominating them.
After a long time, we have seen a perfect gameplay from Chelsea. However, Chelsea was able to play well because the opponent was weak. It is not yet possible to say for sure whether Chelsea will be able to play well against a strong opponent. If Chelsea's performance is so irregular, then it will not be possible for them to occupy the fourth place in the table. Now Manchester City and Newcastle will try their best to occupy the fourth place in the table.
Of course, Southampton is indeed a weak club and was a bonus for Chelsea yesterday. However, Chelsea was able to take advantage of Southampton weaknesses to encourage and motivate themselves on getting four goals, after recent defeat. Manchester City and Newcastle will fight for the 5th position, and not the fourth. Chelsea is on the 4th position after defeating Southampton.