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.
24. April 2018
|Bogut says NBA is career over after joining Sydney Kings|
|Dani Alves: I´d return to Barcelona tomorrow|
|No friendly Roma reunion for Salah, warns Klopp|
|Tom Brady´s agent expects Patriots QB to play in 2018|
|Spurs coach Popovich will miss game five against Warriors|
|A total accident – Durant responds to Instagram criticism of Westbrook|
|Horse named after Pats´ Gronkowski out of Kentucky Derby due to illness|
|White Sox pitcher Farquhar ´progressing well´ after brain surgery|
|Started from the bottom now we´re here! Wall says Drake predicted Raptors sweep|
|WATCH: Translator wins Klopp´s approval after lengthy response|
|Super Bowl champions Eagles planning White House visit|
|Swap spaghetti for burgers? Di Francesco not considering Premier League move|
|Allardyce hits back at style critics after scrappy Everton win|
23. April 2018
|Nothing to prove - Cahill bullish after Chelsea revival|
|Rybarikova sets up Halep clash in Stuttgart|
|Everton 1 Newcastle United 0: Walcott scuppers Benitez´s century celebrations|
|Everton debut ´virtual mascot´ before Newcastle clash|
|Karlovic wins battle of ATP Tour veterans in Barcelona|
|Salah? I can count on Cengiz Under – Di Francesco|
|Robertson ready for Crucible challenge after being ´hamstrung´ by off-table issues|
|Kings XI hold on for dramatic victory against Daredevils|
|´Shameful´ Bolivian side forfeit match at 7-0 down after fielding youth team|
|Henderson fired up for ´fantastic´ De Rossi battle|
|Klopp urges Liverpool fans to ´show respect´ to Roma|
|Juventus confirm muscle tear for Chiellini|
|Klopp key to surprising Salah success – Totti|
|Hartley to miss South Africa tour with concussion|
|Salah´s PFA award made more special by De Bruyne form – Klopp|
|Liverpool have earned the right to be feared, says Gerrard|
|Arsenal confirm ankle ligament damage for Elneny|
|Cubs´ Kris Bryant ´as good as can be expected´ after being hit with 96 mph fastball|
|Hector pledges future to struggling Cologne|
|´Crazy´ fans can help Roma knock out Liverpool, says Voller|
|Sharapova not short on desire despite struggles|
|South Africa to test unbeaten home record vs Pakistan & Sri Lanka|
|Kerr: Ginobili should keep playing another two years|
|He keeps getting better and better - Henderson full of praise for PFA winner Salah|
|Roma v Liverpool: Giallorossi have chance to write positive headlines|
|Prove you are the best - Povetkin promoter lays down Joshua gauntlet|
|Wenger will not be short of offers from clubs - Dein|
|LeBron hails Korver & Clarkson as Cavs square series|
|I may play the kids in the FA Cup next season, reveals bemused Pochettino|
|Simeone weighing up three-man defence for Arsenal tie|
|Kings wait for Bogut signing approval|
|Vieira refuses to address Arsenal rumours and Wenger departure|
|Cueto lowers historic ERA in Giants´ win|
|Spurs avoid sweep, Cavs edge Pacers|
|WATCH: Smith beats first-quarter buzzer with near full-court shot|
|Harden, D´Antoni hope Rockets regain top form|
|Man United star Pogba can win Ballon d´Or, says Ronaldinho|
|Silva loves me more than his girlfriend – Mendy|
|MLS Review: Timbers end NYC´s unbeaten start, Sounders claim first win|
|Flyers´ Couturier played with torn MCL|
|Emery praises PSG for maintaining motivation|
|Cavs´ Hill out for game four with back spasms|
|Oblak unsure over Atletico Madrid future|
|Klopp ready for ´different´ Roma test|
|Salah always determined to prove his Premier League worth|
|Landry earns first PGA Tour victory at Texas Open|
|City´s Sane named PFA Young Player of the Year|
|Salah pips De Bruyne to PFA Players´ Player of the Year award|
|Napoli bus spat at and insulted, Sarri claims|
|Navas will be at Real Madrid for many years – Perez|
22. April 2018
|Juve still have the advantage, Allegri claims|
|Racing coach Labit ready for ´formidable´ Leinster challenge|
|Smalling not giving up on World Cup|
|Hard to catch Man City if they invest, Mourinho warns|
|Pogba: I have no problem with Mourinho|
|Koulibaly: Napoli have always believed in Scudetto|
|Bordeaux 0 Paris Saint-Germain 1: Lo Celso keeps champions on track for records|