Nostalgia was in full bloom at Monday night’s BNP Paribas Showdown at Madison Square Garden as John McEnroe, Ivan Lendl, Pete Sampras and Andre Agassi took the court in front of 19,000-plus fans at the “world’s most famous arena” for a celebration of tennis, dubbed “Tennis Night in America.” McEnroe vs. Lendl and Agassi vs. […]