The Undertaker has been an ever-present figure of WWE for almost 30 years and during that time, he has competed in some of the greatest wrestling matches ever.
That being said, it would be foolish to claim that his best in-ring days are anything but behind him. Advancing age, a reduced schedule and a career full of bumps has significantly impacted his in-ring performance over the last couple of years and, as a result, he just can't perform to the same high standard that he once did.
That, however, doesn't mean that he is incapable of putting on a good show. Sure, he hasn't had an amazing match since his brawls with Brock Lesnar in 2015, but that could be down to the fact that the-powers-that-be simply aren't playing to his strengths when picking his opponents.
In the last few years, 'Taker has been paired with a number of superstars who adopt similar in-ring approaches (Roman Reigns) or suffer from the same issues that he does (Goldberg, Triple H), so they're just not capable of carrying him to a great contest. With that in mind, it's worth considering some smaller, more agile opponents who just might be able to pull off this seemingly tall task.