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.
|Stats amazing - Can marvels at Liverpool newboy Salah|
|Hurricanes deny Lions after costly Henderson yellow|
|FIFA response expected after Bild reveal Qatar World Cup report ´leak´|
|Shanghai Shenhua seek to tie down Guarin and Moreno|
|Westbrook realises childhood dream with MVP award|
|Wall wants to see George in a Wizards jersey|
|Kaino: No intention to injure Murray|
|Germany v Mexico: Werner´s eyes on the prize as El Tri aim to start on time|
|Indians spoil Hamels´ return in high-scoring comeback|
|Asensio praises Donnarumma amid Real Madrid links|
|Australian cricketers preparing for unemployment – ACA president Dyer|
|D´Antoni named best coach as Warriors take home five trophies at NBA Awards|
|Thunder star Westbrook named NBA MVP after historic season|
|Giggs: Rooney could stay at Manchester United|
|WATCH: McCollum guesses Atletico star Griezmann´s NBA impressions|
|Nicklaus: Tiger Woods will have a hard time returning to golf|
|Suarez wants Arsenal´s Bellerin at Barcelona|
|´Respect me and my privacy´ - Serena snaps back at McEnroe|
|McGregor will knock out Mayweather inside 35 seconds, predicts Fury|
|Woods won´t be present for Quicken Loans National|
|Montella hopeful Donnarumma will stay at Milan|
|Halep plagued by French Open nightmare|
|Bolt reminds rivals: I´m the fastest man in the world|
|Confederations Cup Diary: Ronaldo gold for Silva, don´t touch the dial in Chile|
|Madrid allow Llorente to leave for La Real|
|Home hope Watson ousts Eastbourne champion Cibulkova|
|Anything Drogba can do - Hazard invests in new NASL franchise|
|Lyon to keep Lacazette unless replacement bought, says president Aulas|
|Milan goalkeeper Donnarumma apologises for social media ´uproar´|
|Lyon snap up €10m Chelsea forward Traore|
|Green, Leonard & Gobert lead NBA All-Defensive First Team|
|Van Aanholt excited to learn new ideas from Palace boss De Boer|
|Pospisil sets up Djokovic Eastbourne clash|
|FIFA referees chief praises VAR but sees work to be done|
|You´re a wizard, Hummels: Bayern defender celebrates Harry Potter anniversary|
|Kolarov keen on Lazio return|
|Fiorentina put up for sale by Della Valle family|
|Russian World Cup chief labels doping claims ´made-up news´|
|Djokovic to retain Agassi for Wimbledon|
|Like father, like son: Germain hoping to write his own ´beautiful´ Marseille story|
|He made me - Lue would hire Iverson as a coach|
|Giro crash a Tour de France factor for Thomas|
|New Nantes coach Ranieri wants to ´forget´ Leicester|
|Watford new boy Hughes: Premier League too hard to turn down|
|Confederations Cup Social Diary: No rest for Ronaldo, Trapp still smiling and FIFA honours Marc-Vivi|
|Cavendish confirmed for Tour de France after glandular fever|
|Parish surprised by Allardyce´s Palace exit but excited by De Boer arrival|
|New Edinburgh deal for Lion Dell|
|No stepping stone: De Boer hopes to see out three-year Crystal Palace deal|
|Dutch courage needed? De Boer follows likes of Van Gaal & Koeman to Premier League|
|Kvitova pulls out of Eastbourne|
|Frank de Boer appointed new Palace boss|
|I´m in love with Italy - Former AC Milan star Pato open to Inter switch|
|Portugal v Chile: Pizzi ready for tough challenge as champions of Europe and South America clash|
|De Boer waits in the Eagles´ wings: Can the Dutchman improve on Allardyce, Pardew and Pulis?|
|Help me score 10 goals! - Guangzhou defender Feng sets out Paulinho´s Barcelona move conditions|
|Vettel does not think before he acts - Ricciardo|
|Make Mayweather-McGregor free for fans, urges Hopkins|
|Man Utd must wait a year for Talisca, say Besiktas|
|Vettel v Hamilton: Famous sporting squabbles|
|Jose Mourinho pays tribute after the death of his father|
|F1 title race gets nasty as Vettel and Hamilton clash in Baku|
|Cristiano Ronaldo needs time ´to reflect´ on Real Madrid future|
|Draxler, Kimmich and Can lavish praise on ton-up Low|
|Kalac: Donnarumma´s head turned by greedy Raiola|
|Bayern Munich target Brandt staying at Bayer Leverkusen|
|All Blacks boss Hansen hits back at ´desperate´ Gatland|
|PSG´s Verratti would be perfect fit at Barcelona – Garcia|
|Ballin announces retirement from rugby league|
|Portland Timbers 2 Seattle Sounders 2: Dempsey scores stoppage-time equaliser to deny hosts|