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.
|Socceroos have deserved more at World Cup – Skoko|
|Dodgers top Mets in Kershaw´s return from DL|
|MLS Review: Red Bulls end Dallas´ unbeaten run, Sporting stage comeback|
|Hierro: This Spain team similar to 2010 World Cup champions|
|Dowrich, Holder lead Windies fightback after poor start|
|With Neymar back, Brazil are World Cup favourites – Lugano|
|Alba: I don´t understand the criticism of Messi|
|He has sacrificed a lot – Stuani praises Suarez|
|Manning says Brees deserves to break his record for career passing yards|
|Hornets want Walker to play entire career with Charlotte|
|Avalanche sign Grubauer to three-year extension|
|Argentina struggles down to team, not just Messi – Hierro|
|Casey leads Travelers by four after firing 62|
|Scotland run riot in Argentina as Hourcade tenure ends in defeat|
|Germany´s Rudy in doubt for South Korea clash|
|England produce storming fightback to beat New Zealand|
|Shaqiri, Xhaka facing disciplinary action over goal celebration|
|Kvitova takes WTA lead for wins by easing into Birmingham final|
|Jones: England back on road to being world´s best|
|Germany survive in Sochi but questions remain|
|Germany 2 Sweden 1: Late Kroos winner brings Low´s men back from the brink|
|Perisic dreaming of matching Croatia´s France 98 heroes|
|Veron questions Sampaoli for leaving Icardi out|
|Southgate won´t blame injured Alli for playing through pain barrier|
|Travelers Championship: Course invader drives Rory McIlroy and crowd nuts|
|Saul tells Atletico to renew Oblak deal after Griezmann´s new contract|
|Course invader sends McIlroy & crowd nuts at Travelers Championship|
|Saudi Arabia v Egypt: El Hadary eyes history in dead rubber|
|Referee declines Cheika invite after Australia´s series loss to Ireland|
|Griezmann, Mbappe can eclipse Henry, claims Trezeguet|
|Nawalka hopeful of Glik return against Colombia|
|Mexico outsmart South Korea to join Croatia as unheralded World Cup threats|
|´No drama´ for Southgate after England team sheet leak|
|Hend caught by five in Pulheim as Bjerregaard goes low|
|´Little Pea´ Hernandez hits big Mexico milestone in World Cup win|
|Modric and Rakitic the best midfield in Russia - Corluka|
|Cipriani and Farrell ease pressure on Jones as England avoid SA whitewash|
|South Korea 1 Mexico 2: Hernandez nets landmark goal as last 16 beckons|
|Ozil and Khedira axed by Germany|
|Djokovic plans to use two rackets against Cilic after reaching Queen´s final|
|World Cup of penalties? Russia surpasses Brazil after VAR introduction|
|Neymar ´fully recovered´ but Brazil coach Tite has thigh injury|
|Hansen claims France ´clutching at straws´ after another referee controversy|
|Douglas Costa, Danilo out of Brazil´s Serbia clash|
|Hamilton claims 75th pole as Mercedes dominate in France|
|´Mentally strong´ Salah will overcome World Cup disappointment, says Mane|
|Pekerman contemplating unleashing James and Quintero together|
|Schmidt hopes Australia furnace will produce Ireland diamonds|
|I´m missing practice, but it´s OK - Federer ready for Coric|
|Spain v Morocco: Alba makes case for the defence|
|Team-man Lukaku firmly in the race for individual prize|
|Belgium 5 Tunisia 2: Lukaku and Hazard shine as Red Devils run riot|
|Leaked England team gives Panama no advantage, insists Gomez|
|Mane and Senegal holding no fear for Japan|
|Murray to meet Wawrinka at Eastbourne|
|Nigeria goalkeeper Ikeme in remission after year-long cancer battle|
|Lukaku breaks Belgium record against Tunisia|
|Iran v Portugal: Team Melli bullish over qualification chances|
|Mauresmo to be France´s first female Davis Cup captain|
|Maradona angry at Argentina World Cup performances|
|Ireland cap stunning season with series win over Wallabies|
|Uruguay v Russia: Selection posers for already-qualified pair|
|Federer scraps his way to yet another Halle final|
|Lunin rejected ´3,000 offers´ to join Real Madrid|
|On your bike! Iceland physio sent home after cycling accident|
|Not just Real Madrid interested in Fekir, says Aulas|
|France frustrated by officials again as All Blacks complete sweep in style|
|Jose Enrique reveals brain tumour surgery|
|The referee was a disaster, fumes Matic|
|Lakmal to captain Sri Lanka in Chandimal´s absence|