Emergency Press Conference: The Sixers Are A Threat. Boston native Dave Portnoy and Barstool Sports promised the Boston Celtics would sweep the Philadelphia 76ers in the Eastern Conference Semifinals. Joel Embiid and James Harden had other plans. The Sixers took a 3-2 series lead after demolishing the Celtics in Boston and will now look to advance to the ECF with a Game 6 victory back home in South Philly.