Rui Faria has left his post as Manchester United's assistant manager.

After no less than 17 years working alongside Jose Mourinho, the 42-year-old has announced that this summer will bring an end to their working relationship. The pair will hope to close their partnership in style against Watford on Sunday and in next week's FA Cup final.

Faria explained in his official statement: “After a lot of consideration, and with a very heavy heart, I have decided the time is right for me to move on.

“I have had 17 years of incredible and unforgettable experiences. However, I have felt for some time that I would like to spend much more quality time with my family before pursuing any new challenge in my professional life.

“My heartfelt thanks go to the manager, Jose Mourinho, for the belief he had in me, all those years ago, when it all was just a student dream.

Faria steps down as United assistant

"I would like to thank him for the opportunity and confidence, for the knowledge and experience, but most importantly for his friendship."

It's only fitting he passed on his thanks to Mourinho. 

The pair have worked together since their time at Leiria and have enjoyed success at Porto, Chelsea, Inter Milan, Real Madrid and Manchester United ever since.

Mourinho's beautiful reaction

And Mourinho didn't hang about with his reaction to the news with his comments also taking pride of place on Manchester United's official website.

Quite frankly, his reaction was beautiful - check it out below.

"17 years… in Leiria, Porto, London, Milan, Madrid, London again and Manchester," Mourinho reflected.

"Training, playing, travelling, studying, laughing and also a few tears of happiness.

"17 years and the kid is now a man. The intelligent student is now a football expert, ready for a successful career as a manager.

"I will miss my friend and that is the hardest thing for me, but his happiness is more important and, of course, I respect his decision, especially because I know that we will always be together. Be happy, brother!"

A round of applause for Mourinho, ladies and gentleman.

Having spent so much time together and shared so many memories, it's no surprise that Mourinho is feeling emotional about the news and you can tell from his statement.

It will be interesting to see where Faria takes his career going forward and whether, one day, the two Portuguese coaches will sit in opposite dug-outs.

It would certainly make for an interesting dynamic, that's for sure.

For the time being, though, nothing would please United fans and both men more than lifting the FA Cup together next week. Watch this space.

Do you think Mourinho will win the league at United? Have your say in the comments section below.