Chelsea forward was pictured on MadridZone's Twitter hanging out with Real Madrid players Vinicius Jr and Eder Militao after the two sides met last night in the Champions League.
The defending Champions followed their first leg victory with a clinical second half performance yesterday to put the tie beyond doubt.
Vinicius had been so crucial in the first leg, setting up both goals as Madrid put themselves on the brink of qualifying for the semi-finals of the competition.
While his threat was mostly nullified last night, it was his fellow Brazilian that captured the headlines for an incident in the second half.
He took down a breaking Trevoh Chalobah in the final third, with the defender seeming to be in behind the backline.
Already on a booking, Militao was spared a second yellow card, much to the annoyance of Frank Lampard and Ashley Cole on the sidelines.
Felix hung out with Vinicius and Militao
Whether it would have made a difference or not will never be known, but what is known is that the tie was over by the time Felix was substituted on to the pitch.
After the game, he was pictured on Madrid Zone's Twitter sitting in conversation with the two Real Madrid players after the full-time whistle.
This is despite still being under contract with Atletico Madrid, arch-rivals to last night's opponents.
It is so far unclear for sure whether Felix will return to Stamford Bridge again next season, on either a temporary or permanent basis.
It has been claimed though that the club are hopeful of him being able to return for the next campaign, with his immediate impact being positive.
The novelty has certainly worn off though, and it may cause some unrest if Mason Mount is sold to warrant bringing the Portugal international in.