Denver and Boston moved within a single victory of the conference finals after weekend wins over the Los Angeles Clippers and Indiana Pacers, while Oklahoma City and Cleveland staved off elimination to push their second-round series to a sixth game and keep the NBA’s playoff bracket from collapsing into a tidy chalk.

The Nuggets took a 3-1 series lead Saturday night with a 112-104 win at Crypto.com Arena that hinged on a 14-2 Denver run over the final five minutes. Nikola Jokic finished with 34 points, 13 rebounds and nine assists, and Aaron Gordon hit a corner three with 1:42 left that put the Nuggets ahead for good. Game 5 is scheduled for Tuesday night in Denver, where the Nuggets have not lost a home playoff game since April 21.

“We have not closed anything yet,” Nuggets head coach Michael Malone said in his postgame remarks. “Anyone in this league who thinks a 3-1 lead is a series clincher hasn’t been paying attention. We’ve been on both sides of it.”

The Clippers, who fell behind 0-2 at home before splitting Games 3 and 4 in Los Angeles, will need to win three straight against a Denver team that has lost only twice in eleven postseason games. Kawhi Leonard, who has played through what the team has described as a right knee strain since the second round began, was held to 18 points on 8-of-21 shooting Saturday and was visibly limping in the fourth quarter. Head coach Tyronn Lue declined to discuss Leonard’s availability for Game 5, saying only that he would be evaluated by team medical staff Monday.

Boston also took a commanding 3-1 lead over Indiana with a 118-110 overtime win at Gainbridge Fieldhouse on Sunday afternoon. Jayson Tatum scored 41 points, including all 9 of the Celtics’ overtime points, and Jrue Holiday hit the game-tying three with 14 seconds left in regulation after the Pacers had taken a five-point lead with a minute to play. Tyrese Haliburton, playing through a wrist injury sustained in Game 1, finished with 28 points and 12 assists but missed two free throws with 30 seconds left in overtime that would have cut the Boston lead to a single possession.

“Jayson was just unbelievable down the stretch,” Celtics head coach Joe Mazzulla told reporters. “When the building is that loud, on the road, in overtime, in May — that’s the moment you build a roster for.”

Game 5 returns to TD Garden on Wednesday. Should Boston advance, the Celtics would face the winner of the Cavaliers-Bucks series in the Eastern Conference final.

Cleveland forced a sixth game in that series with a 121-116 win at Rocket Mortgage FieldHouse on Sunday night, behind a 39-point, 11-rebound performance from Donovan Mitchell and a clutch fourth-quarter run from Darius Garland, who scored 14 of his 22 points in the final period. The Cavaliers, who trailed 3-1 entering Friday’s Game 5 in Milwaukee, have now won two straight and shifted the burden of closing back onto the Bucks.

Giannis Antetokounmpo led Milwaukee with 33 points and 17 rebounds but committed seven turnovers, including three in the final four minutes. Damian Lillard, in his fifth game back from an Achilles strain, scored 21 points off the bench but was not on the floor for Milwaukee’s last possession after Bucks head coach Doc Rivers opted for a defensive lineup. The decision drew muted criticism in the postgame press conference, though Lillard told reporters he supported the coach’s call.

“That’s Doc’s job, and he’s been doing it a long time,” Lillard said. “We’ve got Game 6 at home. That’s all that matters now.”

The Western Conference’s other semifinal also extended Sunday. Oklahoma City beat Minnesota 114-107 at the Paycom Center to cut its series deficit to 3-2, with Shai Gilgeous-Alexander pouring in 42 points, the highest single-game playoff total of his career. Chet Holmgren added 21 points, 13 rebounds and five blocks, including a swat on Anthony Edwards in the final minute that effectively sealed the win. The series returns to Minneapolis for Game 6 on Tuesday night.

Edwards, who had averaged 32 points across the first four games of the series, was held to 24 points on 9-of-23 shooting and committed six turnovers. He told reporters afterward he was “frustrated, but not panicked,” adding that Minnesota had “the better team and the better building, when it comes down to it.” The Timberwolves, the West’s top seed, have not advanced past the second round since 2004.

Around the league, ESPN and TNT executives said weekend ratings were up sharply against the comparable period last year, with the Pacers-Celtics overtime game drawing the largest Sunday afternoon playoff audience in nine years. League officials attributed part of the increase to the broader rebound in non-news viewership since the April 15 Iran ceasefire, which has pulled audiences back toward sports and entertainment programming.

MLB, meanwhile, completed its first full month of the regular season over the weekend. The Detroit Tigers, who entered April with the lowest projected win total of any contender by Vegas oddsmakers, closed the month at 19-11 and atop the American League Central, while the Baltimore Orioles and Los Angeles Dodgers continued to set the pace in their respective leagues. The New York Yankees, who began the month 1-6, finished April at 14-15 after a four-game sweep of the Tampa Bay Rays.

NBA officials said the league would announce conference final dates and television windows once the second-round series concluded, with the Finals tentatively set to open June 4. Coaches around the league said the compressed schedule between rounds remained a concern, and the players’ association would raise the issue in offseason talks.