United beat Huddersfield 2-0 as Sanchez's goal followed up Romelu Lukaku's opener. "To stay in this position is not our ambition, but it's the one we're in at this moment and we have to fight to keep it".
Apart from Sanchez's brilliance, the other talking point at Old Trafford was Mourinho's decision to drop Paul Pogba following United's damaging defeat to Tottenham Hotspur in midweek.
Despite this, United fans will be happy with Alexis Sanchez netting his first goal for the club, the first of many they will be hoping, and Mourinho was in awe of the Chilean maestro.
Expanding on his comments about Old Trafford, Mourinho continued: "It's not Portsmouth".
United are 13 points behind Pep Guardiola's men with 12 matches remaining and Mourinho intends to use the rest of the campaign as a catalyst for an improved Premier League title charge next season. Here the atmosphere is a bit quieter, ours is not very enthusiastic but the players love playing here.
United was struggling for a creative spark but went up a gear after halftime, going ahead within 10 minutes of the restart when Lukaku smartly turned home a cross from Juan Mata. "Every player prefers to score a penalty".
"Alexis was enjoying the game, he arrived in the end completely dead but he was really enjoying the dynamic of the team and of the team's game". "So for me, that's fine".
Sanchez, though, was powerless to prevent the Red Devils from losing 2-0 to Tottenham at Wembley on Wednesday night.
Mourinho also used his post-match press conference to confirm that Marouane Fellaini is likely to be out until March after knee surgery. To sit on the bench one day is not the worst thing in the world'.
Defeat left United second in the table but a huge 15 points behind runaway leaders Manchester City.
"Scott is a kid who chases the ball hard, and against a team like Huddersfield simplicity sometimes is genius".
"Now we have very important fixtures against teams which are around us".