“Avery Bradley is having surgery today so he’s out for the playoffs,” Rivers said. “That’s that. When a player goes down, that’s disappointing, and especially with what Avery has given us this year. His growth this year has been terrific and it’s been great. He’s become a very valuable piece to our basketball team. His ability to guard the best [opposing] guard at [point or shooting guard] has really taken so much pressure off Rondo, in particular. And not having him means that Rondo now has to go back to that role and run the team, and that’s hard, that’s hard to do, unfortunately and especially against the team we’re playing that has two guards that attack.
“Rondo doesn’t have a lot of breaks. But that’s the way it is. We’ve been a team all year when stuff happens, you deal with it and you just move forward. That’s who we’ve been and that’s who we’re going to have to be [Saturday].”
Then Rivers explained exactly why the Celtics need to fall back on their great defensive principles to get through Game 7 without Bradley, their third straight without their best on-ball defender. The Sixers have a group of athletic guards who attack the basket, and did so at will in Game 6. Evan Turner , Jrue Holiday and Lou Williams all took advantage of a weakened Ray Allen  in drives to the basket.
“We’re great defensive team,” Rivers said. “What Avery did was he allowed us to be a great defensive team and put an individual on one guy and say, ‘Go shut him down.’ We don’t have that anymore so we have to go back to being just a great defensive team.”
Bradley was diagnosed with a sore rotator cuff during the first round series with the Hawks and attempted to play with pain. But early in the third quarter of Game 4 last Friday in Philadelphia, his shoulder popped out of place. He missed Games 5 and 6 before the decision was made to have surgery on Friday.
Bradley, in his second season out of Texas, started 10 games in the playoffs and 28 in the regular season, taking over the starting job from Ray Allen for the final 13 games of the regular season. He average 7.6 points a game in the regular season and quickly won respect around the league as one of the best on-ball defenders in the NBA.