After a couple of challenges, De Gea would go on to establish himself as one of the best in the business at Old Trafford.
There were times when he seemed to make the odd mistake which led to Sir Alex Ferguson taking him out of the firing line on the odd occasion, but it is fair to say that he has got better with each passing day since his arrival at Old Trafford.
It was a pretty expensive deal for a goalkeeper at the time, especially considering he was just 20 when he signed for the club in a deal worth £18.9 million, according to BBC Sport.
He would end up establishing himself as the number one goalkeeper in the second half of the season, though United would narrowly miss out on the title to Manchester City. At the start of the following season, he was still facing pretty stiff competition to hold down his place in the side with Ferguson opting for Anders Lindegaard, but from December onward the Spaniard would become the number one again as United won the league title with ease.
After the retirement of Sir Alex Ferguson, United's level would drop somewhat under David Moyes and Louis van Gaal, but De Gea seemed to find another level - as he was regularly credited with keeping United in games.
His performance reached such a level that it seemed he was poised to sign for Real Madrid in 2015, but seemingly a mishap from the La Liga giants prevented him from making the move.
While the speculation surrounding his future was ongoing, De Gea sat out the early games of last season before committing to a new contract, and regaining his place in the side. Although it was a disappointing campaign for United last term, which saw them finish fifth in the Premier League, De Gea's importance to the side only enhanced as the club lifted the FA Cup.
The form of the Spaniard has been so impressive that he was the first choice goalkeeper for the Spanish national side at Euro 2016, and under Jose Mourinho at Old Trafford he is likely to continue to be an integral part of the side.