Luke Shaw has become an important player in the team this season.
The left-back had an uncertain future at Manchester United before the start of the season after previously failing to impress Manchester United boss Jose Mourinho.
Mourinho admits Shaw reacted well to not being selected and playing regularly.
“The players are different. Men are different, players are different,” Mourinho said.
“And they react in different ways to the development process and Luke reacted in the best possible way.
“ In these difficult moments, the moments where he was not selected, he was not playing regularly, he was saying the same all the time – ‘I want to play for you, I want to play for United, I’m going to make it and I’m going to be the player you want me to be’. And he did it.
“He faced the process in a brave way.”
Mourinho also revealed Shaw started the season even before the season started by going for holiday with a fitness coach and arriving for preseason in a much better condition.
“He started this season – before the season starts in the best possible way,” Mourinho added.
“Where you went for holidays with a club fitness coach and he arrived on day one in much better conditions than a player that just has a holiday for fun and rest.
“Then, by the tactical point of view, I think he absorbed all the information, all the work that we accumulate in the past years.
“Mentally he got stronger and of course the happiness of this season, to start playing regularly, to feel that the place was his place and I think also the national team, in spite of he was not very happy with his injury against Spain, that feeling also helped. So it is a culmination of factors.
“I think it’s an important contract for the club to keep him and it’s important for him because it’s what he wants. I always like the players to be happy so when he gets exactly what he wants, which is a new contract with Manchester United, I think was good news for us.”