The Nets  ran the Celtics  out of their own building, 101-94, but the Bucks bailed them out by losing in overtime to the lowly Magic. The C’s own a three-game advantage on Milwaukee with four games to play. Here’s what went wrong against the Nets, a tough matchup for the Celtics should they meet in the second round.
WHAT WENT WRONG
Worst first: In the opening quarter, the Nets committed three times as many turnovers (6) as they had assists (2). The Celtics held Brooklyn to 7-of-19 shooting, including an 0-for-3 frame from Williams. And somehow the C’s trailed 22-21 after one. The fact that everyone not named Brandon Bass  or Paul Pierce  combined to shoot 3-of-16 didn’t help. The Celtics had a chance to bury Brooklyn early. Instead, the opposite.
Garnett and Green: For different reasons, Kevin Garnett  and Jeff Green  struggled. Garnett seemed to be playing his way back into shape in his second game since missing two weeks with a foot injury, although he made 4-of-5 shots after finishing 1-for-6 from the floor in the first half. Meanwhile, Green got open looks but had an awful shooting night (4-17 FG). Easy rule of thumb: If scoring options 2 and 3 aren’t working, the Celtics are in trouble.
Foul mood: Avery Bradley  picked up three fouls in the first half and his fourth 49 seconds into the second, and Williams took full advantage. Actually, he was the reason Bradley got into foul trouble in the first place. The Nets point guard continued his improved play since failing to make the All-Star roster for the first time since 2009, recording a double-double (29 points, 12 assists). Speaking of fouls, the Celtics didn’t attempt a free throw for almost 28 minutes (thanks to a heaping helping of jump shots). Somebody check on Tommy Heinsohn.
WHAT WENT RIGHT
Super Bass: After averaging fewer than 10 points for the first five months of the season, Bass has scored in double digits in all five games this month. Heck, he practically reached that mark in the first quarter. Illustrating a more versatile offensive arsenal, he threw down a vicious two-handed dunk  over Brook Lopez , knocked down an 18-foot jumper and showed off a creative post move on Reggie Evans  on consecutive Celtics buckets in the opening frame. In an odd move, Celtics coach Doc Rivers  opted not to play Bass for a lengthy second-half stretch while Reggie Evans and Kris Humphries of all people grabbed rebound after rebound.
Living Wilcox: Likewise, the C’s nearly had to file a missing persons report on Chris Wilcox , who hasn’t been the same since injuries to his thumb and alley-oop partner Rajon Rondo ‘s knee. For the second straight game, Shavlik Randolph was the first big off the bench, and for the second straight game, Wilcox played like his playoff minutes depended on it. After all, he’s never participated in the NBA’s postseason. Eighty percent of his shots have come within 2 feet of the basket, and Wednesday was no different, but at least he earned those buckets.
Truth handles: While many of the Celtics regulars struggled — and frankly turned in a preseason performance — Pierce (23 points) plodded his way through another stellar effort. After citing the “chippiness” between the two teams, Pierce probably had this game circled on his calendar. He scored 13 points on four shots in the third quarter alone. While the lead continued to slip away from the C’s as the game wore on, Pierce at least gave them a fighter’s chance, even if he was the only one fighting.