"Chicharito was first class," said Sir Alex at the post-match press conference. "His goal for Chivas was a marvellous strike. He showed his real qualities tonight.
"Chivas played very well and they were very quick. They pressed the ball well and made things difficult for us. They deserved to win.
"As for us, we've been away for three weeks. We've done lots of travelling and I think the players need to go home and rest now."
After completing the first 45 minutes for the Mexican side, Chicharito changed teams and played for United until the hour mark - as planned by the manager.
"It was always my intention to give him only 15 minutes of the second half as he is in the process of recovering from the World Cup," confirmed Sir Alex.
"He will now do some fitness training and endurance work when he arrives in Manchester and he will play more games."
The boss is pleased with the way his new acquisition has acquitted himself during his first week with the United squad.
"Chicharito has done really well," said Sir Alex. "The players have all remarked how good he is and what a great finisher he is - I think there are similarities between him and Ole Gunnar