Austin Rivers is taking on Paul Pierce during some downtime at the Boston Celtics' practice facility in Waltham, Mass. Just a friendly one-on-one between coach Doc Rivers' captain, Pierce -- the seven-time All-Star, the 2008 Finals MVP, The Truth -- and Doc's son, Austin.

Austin hits a couple shots. Pierce returns the favor. Remember, the pros are never serious about this. There's not much of a crowd anyway; most of the players are in the weight room. Nothing to see here.

"I was just doing step-backs, really," recalls Austin, who was giving up about four inches and 50 pounds at the time. "Just shooting jump shots."

His size notwithstanding, Austin goes up 4-2 in the first-to-five matchup. Pierce, who has built a Hall of Fame career with his plodding, effective drives and crunch-time heroics, is suddenly serious.

He starts taking the youngster to the rack, and Austin -- just a high school sophomore at the time -- is powerless to do anything about it. Pierce prevails, 5-4. When asked to recount some of his career highlights to date, Austin doesn't offer this one up. But his dad does.

"Austin was pissed that he lost, mad that he couldn't stop Paul," Doc says.