Manchester United ended Watford's 100% record on Saturday evening, beating the Hornets 2-1 at Vicarage Road.
Romelu Lukaku broke the deadlock in the 35th minute and Chris Smalling doubled United's advantage three minutes later.
Watford's Andre Gray pulled one back for the hosts in the 65th minute but - despite some late pressure - they were unable to find an equaliser.
Nemanja Matic was shown a red card in stoppage time and Watford almost salvaged a point at the death.
But like he's done many times previously, David De Gea came to United's rescue with a stunning save in the 94th minute.
The Spanish goalkeeper managed to tip Christian Kabasele's header around the post to secure all three points for the Red Devils.
Jose Mourinho's side now lie eighth in the Premier League table
Rio Ferdinand immediately reacts
BT Sport pundit Rio Ferdinand played alongside De Gea at Man United for three seasons.
The 27-year-old goalkeeper has since developed into one of the best goalkeepers in world football - and Ferdinand reacted to De Gea's wondersave in the BT Sport studio at the full time whistle.
“David de Gea look at this save here, everything about him, I love him," said Ferdinand on BT Sport.
"He puts points on the board more than anyone on this planet. He’s the best.”
It's a fact that De Gea has singlehandedly rescued points for United on countless occasions over the last eight years.
Another of his former Man United teammates - Tom Cleverley - also offered his opinion in the BT Sport studio.
“The best business United will ever do was keeping him,” said Cleverley.
Watch De Gea's stunning save below.
It's no surprise that De Gea has won the Sir Matt Busby Player of the Year award for four of the past five seasons.
He almost joined Real Madrid in 2015 but the deal reportedly fell through because of a dodgy fax machine.
Man United fans must be thanking their lucky stars.
Is De Gea the best goalkeeper in the world? Let us know what you think by leaving a comment below.