The Spaniard says he is enjoying his first days as a Red Devils player after returning for preseason ahead of the club's upcoming preseason tour of the United States.
Herrera will head to the United States next week for the Red Devils’ preseason tour, with friendlies lined up against LA Galaxy, Roma, Inter and Real Madrid.
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United will then return to England to host Valencia in a final friendly - with the Spanish playmaker likely to appear at home for the first time before the Premier League season begins.
“I am very excited to play at Old Trafford,” Herrera told MUTV. “I played one time here for [Athletic] Bilbao and I have good memories of this game [Bilbao won 3-2 in the Europa League] - you could say I have a 100 percent record here!
“My first game [at home] will be against a Spanish club which is special and I'm sure it will be a special day. I can't wait.”
The 24-year-old joins fellow Spaniards David De Gea and Juan Mata at United and hopes his transition into life in the English top flight will be a relatively smooth one.
“I am very happy and really enjoying being at the club and in the city,” he said. “The first couple of weeks here have been great. Training has been good, similar to at [Athletic] Bilbao in that we train a lot with the ball. The coaches want us to have the ball and keep possession which is great for the players.”
“Juan and David told me United is a big club, maybe the biggest in the world and they said there is a great spirit here. I have [already] seen that. I am happy and just want to start playing now.”