Yeah, I think Tottenham have to be favourites to secure fourth place at the moment, 2 points behind with 2 games in hand, it seems certain they will overhaul United. And yes, United have much bigger internal problems than Spurs do. I don't think Man U will get a Champions League place this season. Ronaldo is getting a bit twitchy as well, they could quite easily implode.
I agree on that, but they have to win for all the games that are still postponed. Tottenham still have some tough games left this season where they will again meet Manchester City, Manchester United, Liverpool and other teams that are difficult for them to beat. I think it's still possible they will drop points, but if all those match that are still postponed can be won then they will secure a place in the top 4.
Although there is no guarantee of qualifying for the Champions League next season, I think Tottenham still have a chance to make it happen in the rest of the season. I'm not sure about Arsenal and Manchester United, Tottenham are better and deserve to be there.