There are a couple of records of this sort in the relevant Wikipedia page. To quote:
Thirteen players tied for first with 5–1 scores at the National Open held on March 17–19, 2000 in Las Vegas: grandmasters Jaan Ehlvest, Alexander Goldin, Alexander Baburin, Pavel Blatny, Eduard Gufeld, Yuri Shulman, Alex Yermolinsky, Gregory Kaidanov, Dmitry Gurevich, ...
A blitz game in the show, between Elisabeth Harmon and Benny Watts is copied from a famous Kasparov - Van Wely encounter in Wijk an Zee 2000.
Or rather, as Loek Van Wely explained himself on Facebook, did he got tricked when Kasparov used Harmon's game from 1968 in a devilish opening preparation ?