Boris Becker has compared the burgeoning rivalry between Olympic tennis gold medalist Andy Murray and Novak Djokovic to Roger Federer and Rafael Nadal's great duopoly and expects it to continue at the Barclays ATP World Tour Finals in London this week.
All four men have won grand slam titles this season, with Murray finally breaking his duck at the US Open, and it is the Scot and Djokovic who have recently taken centre stage. Murray's major breakthrough came with a five-set win over Djokovic in the final in New York, while last month they played another classic decider in Shanghai.
They are guaranteed to meet once more in the group stages at London's O2 Arena this week, and Becker said: "It's always a difficult one to predict but I wouldn't be at all surprised to see a Djokovic and Murray final. They are having a rivalry similar to the one we've seen between Federer and Nadal and a few of the finals we've seen have been amazing."
He went on: "The way they have been playing would suggest they have pulled away but Federer has been the number one for a lot of the year and Nadal won the French Open.
"Tennis is a sport where people pretty much only remember your last one or two matches."
Murray and Djokovic were born only a week apart, with the Scot the older, and have been friends since their junior days more than a decade ago.
Murray believes they have a way to go to match Federer and Nadal, though, saying: "You always want to compete against the best guys, it's the best mark of where your game's at and I've always enjoyed that challenge.
"To say me and Novak would replace anything Roger and Rafa have done, I think that's a long way off but I think some of the matches we've had this year at the Australian Open, the US Open and the match in Shanghai as well, were high-quality matches and fun to watch.
"I'm all for playing more of those matches if I can."