And the tiebreaker goes to John McEnroe.
The seven-time Grand Slam winner beat Bjorn Borg 4-6, 6-4, 10-4 in an exhibition match on Thursday, billed as the final showdown between two of tennis' greatest adversaries and giving the US player the last say in their rivalry.
The two faced off 14 times in ATP tour, Davis Cup and Grand Slam play, each winning seven times.
In a vintage performance before a capacity crowd at Madinat Jumeira Arena, the 47-year-old McEnroe threw himself around, produced some vintage cross-court shots and -- for theatric sake -- smashed his racquet against the court and argued with the umpire.
Borg, three years older than McEnroe and winner of 11 Grand Slam titles, matched McEnroe stroke for stroke, before the fitter US player prevailed.
In the first set, McEnroe looked a little uncertain, but he started getting into rhythm in the second set.
After Borg pulled even at 4-4 with a break in the second set, McEnroe shifted gears and became unstoppable.
The third set, played as a 10-point tiebreaker, was completely dominated by McEnroe.