Spain's preparations for the 2018 World Cup continued on Sunday night as they hosted Switzerland in Villarreal.
Cesar Azpilicueta and Iago Aspas were handed rare starts, while Andres Iniesta captained his country in what was his final appearance for them on Spanish soil.
Having dominated possession, young right-back Alvaro Odriozola put Spain ahead in the 29th-minute with a superb volley, but they were held to a 1-1 draw in the end.
That was in large part down to an incredibly uncharacteristic error from David de Gea, who has fully established himself as a world-class goalkeeper at Manchester United.
The Spaniard produced a mistake which led directly to Switzerland's equaliser, and football fans reacted in very different ways to his disappointing moment.
De Gea's 2017-18 season
Even though Man Utd didn't win a trophy in the 2017-18 campaign, De Gea was outstanding yet again and picked up yet another Player of the Year award.
In the Premier League, United's number one kept 18 clean sheets to win his first Golden Glove since moving to Old Trafford from Atletico Madrid back in 2011.
De Gea makes mistake for Spain
It feels like years since De Gea has made a costly mistake in between the sticks but that's what happened in the 62nd-minute against Switzerland.
As you can see below, Stephan Lichtsteiner's left-footed shot from just inside the box was fumbled by De Gea straight into the path of Ricardo Rodriguez.
Following De Gea's failure to deal with the initial shot, the AC Milan and Swiss left-back had the simple task of tapping the ball home from a couple of yards.
Fans react to De Gea fumble
Whilst it wasn't as bad as the two howlers Loris Karius produced in the Champions League final, De Gea's unexpected error sparked plenty of reaction on Twitter.
Lots of people (including Matt Le Tissier) were simply in pure shock that the ball slipped through the 27-year-old's hands, while most Man United fans leapt to their 'keeper's defence.
Others claimed he needs to step up his displays for Spain and some feel he is behind the likes of Germany captain Manuel Neuer and Jan Oblak when it comes to being the world's best.
Check out some of the varying reaction to De Gea's mistake, including Le Tissier's tweet, below:
De Gea will look to be back at his top-class best on Saturday when Spain play Tunisia in Russia before their opening World Cup match against Portugal on June 15.
What is YOUR opinion on De Gea's error which led to Switzerland's goal? Do YOU think he is the best 'keeper in world football? Have YOUR say in the comments box below!News Now - Sport News