Anyway, if Man United is out from 4th place, which team replaced them? 
Arsenal, Wolves and Tottenham still have the opportunity to replace Manchester United in the 4th position of the standings because these 3 teams still have several games pending. I believe in Arsenal's ability to win games, they are still the favorites although Tottenham will not be overlooked either.The competition to secure the final place in the Champions League is getting more and more interesting now that Manchester United won the match against Brighton yesterday. Obviously Tottenham and Arsenal will press a lot so Manchester United's position in the top 4 is not safe. If these two teams can win the match then it is clear that Manchester United will drop to 5th or 6th position in the standings.
Yeah, you;d have to see Arsenal as favourites for fourth. They have 3 games in hand over Man U, and are 4 points behind, but also have a slightly better goal difference. Even a win, a draw and a defeat across those three games in hand would likely see Arsenal move to fourth. I'm skeptical that Man U will be able to maintain that position, it seems like they owe a lot of it to de Gea ta the moment.