It was all going so well for Real Madrid against Borussia Dortmund on Tuesday night.
Having gone 1-0 up through Cristiano Ronaldo in the opening stages, Los Blancos were under pressure but coping well, with Raphael Varane keeping Pierre-Emerick Aubameyang quiet.
And then it happened. From Gonzalo Castro's free-kick in the 43rd minute, goalkeeper Keylor Navas produced a terrible save that would eventually see the ball rebound into his own net.
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For a professional shot-stopper, it really was an awful attempt to parry the ball when it would have been so much easier to catch it.
The reaction from Navas' teammates was unanimous. Varane had his hands over his mouth, Bale clasped his neck in shock and Luka Modric put his arms in the air as if to say 'what on earth was that?'
It was Sergio Ramos' reaction that was most intriguing, though.
As Dortmund's players celebrated, the Spaniard confronted Navas and asked why he didn't catch the ball while physically demonstrating the action (see below at 1:47).
Even Ronaldo can be seen in the background imitating the motion of catching a ball in frustration, which he would later repeat as he walked down the tunnel with Gareth Bale at half-time.
Navas realised his mistake but appeared to blame the atrocious save on not being able to see Castro's free-kick. Nice try.
He was later caught throwing his own hands in the air and then praying, as if asking for forgiveness.
Zinedine Zidane will have also been frustrated by Navas' error but focused more on the game as a whole in his post-match press conference.
He said, per the Daily Mail: "The players played a great match. The result is a difficult one to accept because we deserved a bit more.
"When you concede three minutes from the end it hurts, especially given the effort the players put in. But it is not a bad result.
"I think in the first half we suffered a bit because they pressed a lot and we knew it is a difficult place to come against a good team, but I am very proud of the game we played."
Somewhat bizarrely, Zidane claimed it was a "complete" performance from his side.
"It was complete in every sense but the shame is it is three games in a row now we have drawn," he added.
Varane restored Real's lead in the second half from Ronaldo's cross but a late equaliser from Andre Schurrle saw Dortmund rescue a vital point and retain their place at the top of Group F.