De Gea was gifted a special momento by United captain Bruno Fernandes before kickoff and given a standing ovation as he was subtituted in the second-half of the 1-1 draw in Saturday's preseason friendly.
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Afterwards, United's former long-time No1 took to social media to say: "A magical moment for me and my family to come back to Old Trafford - my home.
"From the bottom of my heart - I want to say thank you for the reception - for all the love you shown me today."
"To the supporters that never stopped being with me throughout my time at this club.
"Our paths may cross again but for today..
"We've seen it all!"