Matthew Tkachuk and Leon Draisaitl do not like one another. They don't like each other when they're playing in the NHL for the Florida Panthers and Edmonton Oilers, respectively. They don't like each other when they're on vacation and pass each other on a random beach in the Caribbean. And they especially don't like one another when they're representing their countries at the Winter Olympic Games. On Sunday, Tkachuk's United States of America faced Draisaitl's Germany in a group-stage matchup.