Following Manchester United’s 3-2 defeat to Brighton last weekend, Jose Mourinho knew he needed to make drastic changes for the visit of Spurs.

And he did just that.

Mourinho made six changes to his starting line-up - as well as a drastic tactical switch.

United lined-up in an unexpected 3-5-2 formation, with Ander Herrera operating on the right side of defence.

And it looked to work wonders for the Red Devils in the first-half.

Tottenham’s attacking full-backs, Danny Rose and Kieran Trippier were totally nullified by United wing-backs Antonio Valencia and Luke Shaw respectively.

It was the kind of high pressure we’re not familiar with a Mourinho side.

Also, with Fred pushing forward behind Jesse Lingard and Romelu Lukaku, it pushed Spurs back and forced them to defend narrow to cover the attacking trio.

But after such a positive opening 45 minutes, what went wrong in the second half?

Well, a tactical analysis video has emerged that breaks down exactly what went wrong.

WATCH: HOW SPURS WON THE GAME IN SECOND-HALF

Take a look:

It shows that Spurs changed their attacking style slightly and exploited the gaps that appeared in United’s defensive line.

The first two goals stemmed from the gap between United’s midfield and defence being far too big, with the likes of Dele Alli and Lucas Moura taking full advantage.

The second goal also came about after makeshift defender Herrera was too deep, playing Christian Eriksen onside.

CONCLUSION

The conclusion of the video?

“United started the game really well, with a great offensive approach. At the start, Spurs had issues as they weren’t expecting United to go with a back three with Herrera as the third centre-back.

“But Pochettino’s men stayed compact in the first-half, and took their chances in the second-half.

“Overall, a very well-deserved victory for Spurs. They were compact defensively and clinical with their finishing.”