The first goal in particular was a gem, as he took Javier Hernandez's square ball before stepping inside Ivan Ramis and then belting a superb shot into the corner with his supposedly weaker right foot.
"We knew we were getting a top player who would make a difference to the team," said Ferguson. "That is why we went for him.
"Robin is a completely rounded footballer. He has great international experience, he's played for Arsenal for seven years and he came to us at the very peak of his career.
"His ability to make and take goals is fantastic.
"His play for his first goal was absolutely magnificent, his turn, his balance, no drawback, just side footed it in. It was a really good goal."