Sebastian Weyer had recently posted the first official sub-20 4x4x4 solve (19.41 seconds) at Berlin Summer Cube Days 2017 June 10-11, after Felixs had held the single record of 21.54 for 4x4x4 since 2015.
Sebastian has always been very competitive in this event, and is currently second in the world now - because Felixs had to take back the single record on June 22 in Arequipa, Peru at their Latin America Cubing tour event.
At the moment, Sebastian Weyer still holds the average record of 23.03 for 4x4x4, a full second and a half faster than Feliks' best average of 24.57
I had mentioned that at the end of April, that Max Park had overtaken Feliks Zemdegs' long-standing Ao5 3x3x3 cube record. Feliks traveled to Chía, Colombia for the Chía 2017 on June 28 and 29, another part of the Latin America Cubing tour. This was a very large competition with over 200 competitors in the 3x3x3 division. Most of them were from Colombia, but a handful were from nearby countries (Venezuela, Peru, Ecuador) and another handful were from not so nearby countries (Australia, New Zealand, USA, and Canada).
In the first round, Feliks posted an average of 5.97 seconds, substantially below the previous record of 6.39 seconds.
Feliks had actually done better than this at home practicing but had not as yet managed to get a time as good as that at a competition.
At the Chía event, Feliks also bested his world record single on 5x5x5 to bring it down to 41.24 seconds.
So, now that Feliks has taken those back - of the 33 current official WCA records, Feliks holds 9 of them.
Note - I typed this a few days ago, and this could change by the time you read it because today is the second day of the US Nationals taking place in Fort Wayne, Indiana.