It never happened between Magic Johnson's Lakers and Larry Bird's Celtics. Same for Michael Jordan and Karl Malone or Jerry West and Bill Russell.
While there have been 14 rematches in NBA Finals history, this year's meeting between LeBron James' Cleveland Cavaliers and Stephen Curry's Golden State Warriors will be the first trilogy in league history.
Complete coverage of the Philadelphia 76ers and their rivals in the NBA from NBC Sports Philadelphia.
After the Warriors beat the Cavs for their first title in 40 years in 2015, Cleveland got revenge last season with a comeback from 3-1 down to give the city its first major championship since 1964. Now they meet for the rubber match starting June 1 in Oakland.
While this may be unprecedented in the NBA, it has happened once before in the NFL, NHL and Major League Baseball with matchups that included some of those sports' biggest stars.
There was Babe Ruth vs. Frankie Frisch in the 1920s and then a pair of memorable three-peat matchups in the 1950s featuring Otto Graham against Bobby Layne in the NFL and Gordie Howe against Maurice Richard in the NHL.
Warriors: Durant once team's 2nd choice
Truth be told, Golden State's former coach wasn't sure the Warriors needed Kevin Durant.
The Warriors were already small-ball sensations, capable of piling up the points with their daring drives and sizzling shooting. So rather than add another scorer, Don Nelson figured Golden State might be better off getting a dominant man in the middle to shore up the defense in the 2007 NBA draft.
Nelson thought the Warriors needed Greg Oden.
That was 10 years ago, leading up to the heavily hyped draft in which the Oden-Durant debate raged throughout basketball. And now, as Durant leads the league's most potent team into the NBA Finals while Oden is long gone from the NBA spotlight, it's easy to forget that a lot of people agreed with Nelson.
"I think everyone felt that there were two players there that were going to be prominent players, but one thing you can't count on is injuries," Warriors executive Jerry West said. "So Greg really never had a chance to have a career, where Kevin's obviously been more than advertised."
Celtics: Thomas unsure if he'll need surgery
Boston Celtics point guard Isaiah Thomas wanted to keep playing in the Eastern Conference finals, but team doctors and officials convinced him he needed to shut down his season for his long-term health.
"They had multiple people come in and talk to me about what's more important," Thomas said Friday, a day after the Celtics were eliminated by the Cleveland Cavaliers. "But I definitely wasn't trying to hear that at that point in time."
Thomas injured the hip in March and aggravated it in the second-round series against Washington. He played three halves against the Cavaliers before limping off the court in the middle of Game 2.
The Celtics lost that game by 44 points to fall behind 0-2 in the best-of-seven series, then announced the next day that Thomas was done for the season. Still, they beat the Cavaliers in Cleveland the next game before falling easily in Games 4 and 5.
"Eastern Conference finals, that's the biggest stage I've ever been on," Thomas said at the team's practice facility in Waltham, Massachusetts. "To not be able to go back out there in that second half and continue that series was painful. Like it hurt me."
Speaking for the first time since the end of his season, Thomas said he might need surgery but it's "not the No. 1 option right now." He will have to wait for more tests until the swelling goes down, he said (see full story).