The Boston Celtics responded to hasty dismissals of their NBA playoff chances by beating the Cleveland Cavaliers 104-86 Monday to square their second-round series at a game apiece. Rajon Rondo tied a team playoff record with 19 assists, Ray Allen scored 22 points and the Celtics showed they're still very dangerous despite their advancing years. Having blown an 11-point lead in the third quarter of Game 1, the Celtics almost squandered a much bigger one Monday. They led 91-66 with 9:08 left, but the Cavs scored 15 straight and pulled within 93-83 with 3:13 left. Boston, though, closed with an 11-3 spurt to level the series ahead of hosting Game 3 on Friday. LeBron James scored 24 and Antawn Jamison 16 for Cleveland, outscored 31-12 in the third. Two years removed from their 17th NBA title, the Celtics were given little chance of getting past James and the top-seeded Cavs. Despite beating Miami in the first round, Boston was thought to be too old, too slow and too reliant on the aging Big Three of Allen, Kevin Garnett and Paul Pierce. But the trio combined for 54 points with Rondo setting them up with passes from impossible angles. Rondo matched the club's postseason record for assists set by Hall of Famer Bob Cousy. Suns 111, Spurs 102: In Phoenix, the hosts fought off third and fourth-quarter comebacks to beat San Antonio in the series opener. After resting his sore hip for three days, Steve Nash had 33 points and 10 assists for the Suns. Jason Richardson scored 27 and Amare Stoudemire had 23 points and 13 rebounds. Manu Ginobili, tape across his broken nose, led San Antonio with 27, Tony Parker had 26 and Tim Duncan 20. The Spurs had won four straight Game 1s against the Suns, two of them in Phoenix. Both of those times, in 2005 and 2007, the Spurs went on to win the NBA title. In the second half, the situation seemed ripe for another of those San Antonio daggers to the Suns' heart. Twice San Antonio rallied from 14 back, with a 12-0 run in the third quarter and a mighty 13-0 outburst that sliced Phoenix's lead to 94-93 with 4:26 to go in the game. Stoudemire sank two free throws, then after the Spurs twice missed 3-pointers, Grant Hill made two from the line to put the Suns ahead 98-93. Parker's 19-footer cut it to 98-95 with 3:38 left, then Richardson brought the house down with a 3-pointer to make it 103-95 with 1:23 left. After Parker's two free throws cut it to 103-97, Grant Hill made a 13-foot jumper with 51 seconds left, and the Suns put it away by making six of eight free throws from there. The Spurs had to rely on their veteran big three, without much help, to stay in the game. George Hill managed just nine points on 2-of-9 shooting and struggled defensively. Richard Jefferson had five points and three rebounds in 33 minutes.