"Looking at the result I would be lying if I said it wasn't intentional", Ramos told television reporters.
Following that, Ramos would have a "clean slate" if Real Madrid are to advance to the next round of the competition.
"It is not to underestimate the opponent nor to think that the series is over, but in football you have to make tough decisions".
De Jong, who will join Barcelona in the summer, got his first experience of a match against his future domestic rivals and one player in particular impressed him.
Dortmund's United States midfielder Christian Pulisic (left) and Tottenham Hotspur's Ivorian defender Serge Aurier battle for the ball during the Uefa Champions League first leg match at Wembley Stadium on Wednesday night.
Ramos reportedly acknowledged his intentions in a post-game interview, then retracted it in a post on Twitter.
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The hosts appeared the more likely to score the second goal of the game, but Chelsea doubled their advantage shortly before the hour mark when good work from Willian gave Giroud the chance to cleverly flick the ball into the net from close range.
According to the Uefa Disciplinary Regulations, players face a two-game suspension "for clearly receiving a yellow or red card on purpose" and thanks to comment Ramos made on Spanish television after the match he could well be in hot water.
"In the second half we had whole control of the game and had a lot of chances, it's frustrating to concede a goal and not to have a better result".
Ramos' teammate Dani Carvajal suffered the same fate last season when a yellow card he picked up against Apoel Nicosia was deemed to have been deliberate.
Uefa added that Ajax had been charged over the throwing of objects, setting off of fireworks and display of an "illicit banner" by fans. Real were charged with the setting off of fireworks.
Chelsea get the job done, just - This match was all about Chelsea coming away without any further scars after a hard period for Maurizio Sarri's side - and they did so, just about.
Atlético, meanwhile, have announced that Diego Simeone has renewed his contract as manager until 2022.