That is according to Sky Sports pundit and former British No 1 Annabel Croft.

Federer and Goffin go head-to-head in the first semi-final at London’s O2 Arena.

Goffin beat Dominic Thiem in straight sets this afternoon to secure his place in the last four.

Federer has beaten the Belgian all six occasions they have played each other, including in the semi-finals of the Swiss Indoors last month.

Croft says playing against Federer in front of his adoring London fans is an even tougher task than usual.

She admits she cannot see an upset unless Goffin is on top of his game.

“I think he said it himself, the level from what we saw today has to come up quite a few degrees,” Croft said.

“You’re taking on Roger Federer in almost his home country isn’t it, he’s had success on this very court and of course at Wimbledon, he has so much support here. 

“The kind of tennis that he’s putting out on the court, you are going to have to match it in every single department. 

“There will still a few of those wobbly double faults weren’t there that were coming in at some key moments. 

“You have to be absolutely at the top of your game to be able to take him out. 

“I can’t really see it happening but let’s wait and see.”