Top 5 Photos, 9/24: Winning Laver Cup debuts for Berrettini, Ruud; Medvedev's Grand Slam intro

Daniil Medvedev is introduced on court for the first time since becoming a major champion at the US Open on September 12.

Stefanos Tsitsipas and the rest of Team Europe cheer on squad member Casper Ruud during Boston's opening match.

Team Europe's Casper Ruud returns to the locker room after winning his Laver Cup debut, 6-3, 7-6 (4), over Team World's Reilly Opelka.

Team World captain John McEnroe and event co-founder Roger Federer pose with the Laver Cup trophy after joining together for an interview.

Matteo Berrettini warms up prior to his first Laver Cup match, one he'd eke out, 10-8 in a match tiebreaker, over good friend Felix Auger-Aliassime to add another point for Team Europe.