Jose Mourinho's punditry debut for Sky Sports was always going to be interesting given the game he was covering: Manchester United vs Chelsea.

Mourinho managed Chelsea for six years across two spells and spent three years at United, where he was sacked in December 2018.

So fans were expecting the Portuguese to have a lot to say about his former clubs alongside Graeme Souness.

And he did. Before the game, Mourinho confidently ruled out United and Chelsea as contenders for the Premier League title this season.

When asked who he thinks will challenge, he said: "Four. Manchester City, Tottenham, Liverpool and the City B team.

"When I looked at the bench [against West Ham], the players not involved, I think even the B team could fight for the title."

It says a lot about United and Chelsea's current squads that Mourinho thinks City's B team would put up a stronger title challenge than them.

More of the same scrutiny was expected at half-time and Mourinho didn't fail to deliver by making a sly dig at Luke Shaw.

Mourinho and Shaw didn't quite see eye to eye at United for various reasons and Mourinho had a warning for £80m signing Harry Maguire about the England left-back.

"When Maguire has to cover Luke Shaw, and he will need to realise that he will need to do that a lot of times this season, they are not closing down the space in the box," the 56-year-old said.

Ouch. Mourinho clearly isn't a fan of Shaw.

Not that Shaw will care - United comfortably beat Chelsea 4-0 to make the perfect start to the 2019/20 season.

Marcus Rashford (2), Anthony Martial and debutant Daniel James grabbed the goals for the Red Devils, who didn't seem to miss Romelu Lukaku in the slightest.