The Anaheim Ducks completed a series sweep over the Calgary Flames, as the Washington Capitals drew level with the Toronto Maple Leafs.
Anaheim asserted their claim to the top with a 3-1 win in game four to progress from their opening-round Western Conference playoff tie on Wednesday.
Patrick Eaves, Nate Thompson and Ryan Getzlaf scored for the Ducks, who swept a best-of-seven series for the fifth time in their history as they await either the Edmonton Oilers or the San Jose Sharks in the second round.
The Capitals prevailed 5-4 against the Maple Leafs to level their series at 2-2.
Washington raced out to a 4-1 lead in the opening period before Toronto rallied late on home ice but the Capitals held on in game four.
The Minnesota Wild needed a headstand from Devan Dubnyk to blank the St Louis Blues 2-0 and stave off elimination until at least game five.
Minnesota still trail St Louis 3-1.
The Ottawa Senators beat the Boston Bruins 1-0 for a 3-1 series lead.
T.J. Oshie, Capitals - Washington's top line was their best line, accounting for three goals in a critical victory in game four to pull even with the Maple Leafs. Oshie was credited with two of them - his first of the playoffs - including the one that stood as the game-winner when Toronto made things interesting in the final minute. Honourable mentions for line-mates Alex Ovechkin and Nicklas Backstrom for coming up big.
Craig Anderson, Senators - Anderson's 22-save shutout in game four has Ottawa one win from their first trip to the second round since 2013. What is more, the Bruins have never come back from down 3-1 to win a series (0-22 all time). It was the fourth doughnut of Anderson's playoff career and the veteran improved to 9-2 with a .928 save percentage in his last 11 games overall against Boston.
Devan Dubnyk, Wild - Dubnyk is hardly to blame for Minnesota's first-round hole. He made 28 saves in game four to singlehandedly keep the Wild's season alive, logging the second shutout of his playoff career.
Erik Karlsson, the Senators' do-it-all defenceman, should win the Norris Trophy this year as the NHL's best blueliner. He has certainly been at his best in the playoffs and made another magician-like pass to Bobby Ryan to set up the only goal of Ottawa's game-four victory.
Thursday's game to watch
Game 4: Blackhawks at Predators - It has been difficult through the years to define Blackhawks-Predators as a division rivalry, considering Chicago's domination on the head-to-head playoff ledger. This time, though, Nashville are in command and would achieve some serious payback if they deal the Western Conference's top seed an embarrassing first-round sweep.
23. Juni 2017
|Timberwolves acquire Butler from Bulls in blockbuster trade|
|Thurston to undergo surgery, miss rest of 2017|
|Bracewell misses out as New Zealand trio earn contracts|
|Cambiasso: I didn´t fit in at Madrid because I wasn´t a galactico|
|Benzema eyeing more titles with Madrid|
|Mignolet ´really hungry´ for silverware with Liverpool|
|Spieth opens with 63 to lead Travelers|
|Ball stays in LA, goes to Lakers with number two pick|
|Philadelphia 76ers select Fultz with number one overall pick|
|Salah: Everything has improved since I left Chelsea|
|Low lauds ´excellent´ Stindl after Germany draw|
|Rangers swoop for Mexico duo Pena and Herrera|
22. Juni 2017
|Confederations Cup Social Diary: Record man Sanchez shines as rivals fail to bury hatchet|
|Sanchez refuses to offer Arsenal future update|
|Confederations Cup Diary: Summer ´snow´ and Ronaldo mural explained|
|Widnes climb off the bottom with Leigh victory|
|Alexis Sanchez´s record-breaking goal ´very special´, says Pizzi|
|Chiefs part ways with Dorsey but give Reid an extension|
|Super Sanchez and Chile thwarted by Germany but World Cup ambitions firmly on track|
|Salah can win at the highest level with Liverpool, says Klopp|
|Hamilton focused on beating Ferrari, not driving for them|
|The life of a front player - Cameroon boss Broos reflects on Aboubakar horror show|
|Liverpool complete €42m Salah signing|
|Azarenka comeback halted by Konjuh in Mallorca|
|Germany 1 Chile 1: Stindl denies record-breaker Sanchez|
|Cameroon identified Ryan weakness, Zambo Anguissa reveals|
|Svitolina doubtful for Wimbledon after Birmingham exit|
|Lonzo Ball makes case for LeBron James to join him on Lakers|
|Hamilton clarifies F1 retirement talk|
|Real Madrid reject Mourinho contract allegations|
|Alexis Sanchez becomes Chile´s all-time top goalscorer with Germany strike|
|Querrey ousts giant-killer Thompson as Cilic powers on|
|Garcia two behind surprise package Ormsby in Munich|
|Shaqiri to Roma? Stoke have ´no plans´ to sell|
|Federer reaches last eight in Halle, injury concern for Nishikori|
|Bad moon rising for Postecoglou as Australia stumble again|
|Day´s struggles continue, McIlroy back in the red|
|Mexico v Russia: Cherchesov ready for ´final´ with last-four spot at stake|
|Cameroon 1 Australia 1: VAR in the spotlight again as Socceroos claim controversial point|
|Mainz sign Germany keeper Adler|
|Dennis opted out of Tour de France selection|
|Man Utd target Morata sets out aim for ´busy´ 2018|
|Vettel: Ferrari deserve more credit for bridging Mercedes gap|
|Balotelli ´ready to make financial effort´ for Nice stay|
|Santos staying positive as Lucas Lima to Barcelona rumours swirl|
|Arsenal extend Asano´s Stuttgart loan|
|Lorenzo hoping to be remembered fondly after retirement|
|Raiders make Derek Carr richest player in NFL history with contract extension|
|Halep accepts Eastbourne wildcard|
|Afghanistan and Ireland confirmed as Full Members by ICC|
|New Zealand v Portugal: Pepe urges Selecao to be faithful to their style|
|Super League promotion for 21-year-old referee|
|No negotiations with Barcelona for Dembele - Dortmund´s Zorc|
|Lealiifano returns under 12 months on from cancer diagnosis|
|Team Sky name strong Tour de France support act for Froome|
|F1 Raceweek: Bottas pressed on 2018 drive, Ocon and Perez make up|
|World Cup in Russia will be safe and successful, vows sports minister|
|Kazan mayor promises World Cup Messi mural to rival Ronaldo´s|
|China U20s set to play in German league|
|Nishikori retires from Halle clash with Khachanov|
|Dortmund defender Guerreiro´s injury downgraded to bruising|
|Ducuing to make first France start, Plisson and Dulin return|
|Shanghai SIPG star Oscar handed eight-game ban|
|Ireland hand first starts to Tracy and Treadwell|
|Cavani one of best strikers on planet - Di Maria|
|Guerreiro confirms fracture, ruled out of Confederations Cup remainder|
|He´s human we´ve all been there - Rojas defends New Zealand skipper Wood|
|Kasper Schmeichel at Man Utd would be ´a dream´ for dad Peter|
|Borussia Dortmund move for Barcelona wonderkid Lee|
|Worry is a wasted emotion - Hansen not concerned by Lions challenge|