In a recent interview with ComicBook, The Undertaker discussed a possible dream match with Sting which has been rumored for many years. 

The Deadman didn't rule out such a match but he is unsure if they would be able to live up to people’s expectations at this stage in their career.

Here is what he said:

"Well, in this world, you never say never, but I think as great as it sounds on paper…and it does, I mean obviously that is a super marquee match, right?

But where I kind of differ from a lot of people is I look past the marquee value and I look on the ability to deliver.

So like you said, there’s so many people that are clamoring for that match that I just don’t know that the match could deliver on the people’s expectations.

And the only reason I say that, I’ll take full [responsibility], I don’t have the mobility or the same skill set that I once did that I would need to make that match great.

So there’s just certain things, it’s better left to the theater of the mind to actually put it out there. And then with the expectations being so high and the match not delivering, it would be a bigger disappointment than the match never happening at all."