user21785: I like watching Hikaru's youtube videos. 
His commentary on the games is very descriptive, unlike other players that stay quiet for most of the game. Hikaru's always talking, letting you know what's going on.
However, one strange thing I've noticed is the COMPLETE absence of any sort of online interaction with Magnus. He's uploaded hundreds of videos, yet none contain matches against Carlsen. 
I thought this was strange, since I know Carlsen plays a lot online too, and Hikaru's got matches with a lot of other top players, but never Carlsen.
The other day, I noticed a youtube comment in his video that said "play Carlsen", and somebody responded with "we don't mention that name here", and it got tons of upvotes.
So I am clearly out of the loop here: what's going on? Why is Hikaru actively (seemingly) avoiding Carlen online?

user21789: To be clear, Hikaru is not actively avoiding Carlsen. It's just that their affiliations make them play on different sites.
Hikaru has a partnership/sponsorship deal with chess.com whereby one of the stipulations is that he plays exclusively on chess.com.
Magnus Carlsen has invested in Chess24 (among other chess-related sites), and he will default to that site for regular content in order to drive more traffic there.
I've followed both players closely, and I've seen no indication that they are actively avoiding each other. In fact, both players will always seek out the best possible opponent that is currently online whenever they make content. But playing on different sites, they will very rarely play each other.
Carlsen will, however, often play leagues and tournaments on different sites, including both chess.com and lichess.org. For instance, you'll often find him as a contender in the monthy Titled Arena tournaments on lichess. For instance, he won last month's tournament.
Another example, though I believe this was before his investment in chess24, he competed with Hikaru in the final of chess.com's GM Blitz Battle. You can see their whole match here: https://www.youtube.com/watch?v=UuehyRf88ac
Disclaimer: Just because I haven't seen any clear indication of active avoiding, doesn't mean that there isn't any. I just haven't seen any reason to believe that is the case.

user21014: There was there match in the 2017 chess.com speed chess championship final, but I think that it has to do with Carlsen mainly playing on chess24 and lichess while Hikaru plays on chess.com(mainly). This is not to say that Hikaru tries to avoid playing Carlsen in general as they both had huge fighting games together. An example I can give is their game from the London Chess Classics 2017.

21785: <p>I like watching Hikaru's youtube videos. </p>

<p>His commentary on the games is very descriptive, unlike other players that stay quiet for most of the game. Hikaru's always talking, letting you know what's going on.</p>

<p>However, one strange thing I've noticed is the COMPLETE absence of any sort of online interaction with Magnus. He's uploaded hundreds of videos, yet none contain matches against Carlsen. </p>

<p>I thought this was strange, since I know Carlsen plays a lot online too, and Hikaru's got matches with a lot of other top players, but never Carlsen.</p>

<p>The other day, I noticed a youtube comment in his video that said "play Carlsen", and somebody responded with "we don't mention that name here", and it got tons of upvotes.</p>

<p>So I am clearly out of the loop here: what's going on? Why is Hikaru actively (seemingly) avoiding Carlen online?</p>
 21789: <p>To be clear, Hikaru is not actively avoiding Carlsen. It's just that their affiliations make them play on different sites.</p>

<p>Hikaru has a partnership/sponsorship deal with chess.com whereby one of the stipulations is that he plays exclusively on chess.com.</p>

<p>Magnus Carlsen has invested in Chess24 (among other chess-related sites), and he will default to that site for regular content in order to drive more traffic there.</p>

<p>I've followed both players closely, and I've seen no indication that they are actively avoiding each other. In fact, both players will always seek out the best possible opponent that is currently online whenever they make content. But playing on different sites, they will very rarely play each other.</p>

<p>Carlsen will, however, often play leagues and tournaments on different sites, including both chess.com and lichess.org. For instance, you'll often find him as a contender in the monthy Titled Arena tournaments on lichess. For instance, he won <a href="https://lichess.org/tournament/feb19lta" rel="nofollow noreferrer">last month's tournament</a>.</p>

<p>Another example, though I believe this was before his investment in chess24, he competed with Hikaru in the final of chess.com's GM Blitz Battle. You can see their whole match here: <a href="https://www.youtube.com/watch?v=UuehyRf88ac" rel="nofollow noreferrer">https://www.youtube.com/watch?v=UuehyRf88ac</a></p>

<p>Disclaimer: Just because I haven't seen any clear indication of <em>active</em> avoiding, doesn't mean that there isn't any. I just haven't seen any reason to believe that is the case.</p>
 21014: <p>There was there match in the 2017 chess.com speed chess championship final, but I think that it has to do with Carlsen mainly playing on chess24 and lichess while Hikaru plays on chess.com(mainly). This is not to say that Hikaru tries to avoid playing Carlsen in general as they both had huge fighting games together. An example I can give is their game from the London Chess Classics 2017.</p>
