Tottenham’s 4-1 victory over Liverpool on Sunday and Manchester United’s 2-1 defeat to Huddersfield 24 hours earlier has brought the two sides level on 20 points.
They are currently five points behind leaders Manchester City and go head-to-head at Old Trafford this Saturday (12.30pm).
Robson says recent results for Spurs and United has changed his mind on who will challenge City for the title this season.
“Two weeks ago I would have said Manchester United had a chance of winning the Premier League title,” he said.
“But a couple of defensive performances, a very good defensive performance against Liverpool but not a good performance overall, then they don’t play well against Huddersfield, problems with Mourinho having a go at his players.
“Tottenham who they were talking about not doing particularly well at Wembley thrash Liverpool and play really, really well.
“So at the moment I think Tottenham look like the team that can really challenge Manchester City.
“They’ve got I think a better all-round game, I think several of their players are more consistent than the Manchester United players.
“(Anthony) Martial, is he going to play well week in week out? Is (Henrikh) Mkhitaryan going to play well week in week out?
“Is (Juan) Mata going to be a top player week in week out?
“Is (Romelu) Lukaku, when (Paul) Pogba’s not playing, going to get the service?
“At the moment I think Tottenham are the better side.”
