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.
|Ballance, Crane in? Foakes or Buttler? England´s Ashes selection dilemmas|
|Player dismissals and bat restrictions - new ICC playing conditions set to come into force|
|We must finish chances - Klopp|
|94 wins, 112 goals – the amazing numbers behind Ronaldo´s 150 UEFA club games|
|Besiktas 2 RB Leipzig 0: Black Eagles break home drought to stay top of Group G|
|Monaco 0 Porto 3: Aboubakar double sets Portuguese on way to impressive win|
|Sevilla 3 Maribor 0: Ben Yedder hat-trick moves Berizzo´s side top of Group E|
|Spartak Moscow 1 Liverpool 1: Klopp´s men held again|
|Manchester City 2 Shakhtar Donetsk 0: De Bruyne scores stunner as Aguero misfires|
|Napoli 3 Feyenoord 1: Hosts dedicate goals to injured Milik in comfortable win|
|APOEL 0 Tottenham 3: Kane hits hat-trick in Cyprus stroll|
|Borussia Dortmund 1 Real Madrid 3: Ronaldo double seals win on 400th appearance|
|Stokes awaits England vice-captaincy fate following Bristol arrest|
|Costa´s Atletico return: Henry, Tevez, Rooney and other players who went back|
|Costa´s Atletico return: Torres, Aguero, Falcao and Griezmann and the Rojiblancos´ history of fine f|
|Simeone wary of in-form Chelsea star Morata|
|Diego Costa´s Atletico Madrid return finalised|
|Presidents Cup: Strong US squad in search of seventh straight win|
|Azpilicueta pleased with delayed Costa reunion|
|Injured Milik was not rushed back, says Napoli doctor|
|Alcacer future unknown - Valverde|
|Key trio fit for Atletico clash - Conte|
|Al Hilal 4 Persepolis 0: Kharbin treble puts Al Hilal in complete control|
|It´s all trebles and sextets – Valverde accepts pressure to deliver at Barcelona|
|Chelsea must ´change the history´ of Spanish dominance in Europe, says Conte|
|Ex-England skipper Flintoff set for Lancashire role|
|No Mendy for City amid knee injury fears|
|Ancelotti: Lewandowski will finish his career at Bayern|
|F1 Raceweek: The heat is on and there´s a dinosaur in the paddock|
|CSKA aim to find weaknesses in Mourinho´s ´strong´ squad|
|Tardelli ´expects more´ from Juventus star Dybala|
|Watford´s Chalobah set for knee surgery|
|Halep and Wozniacki crash out in Wuhan, Muguruza through|
|Barcelona are weaker without Neymar, says Jorge Jesus|
|Seeded Sousa succumbs in Shenzhen|
|US Justice Department charges college basketball assistants in bribery scheme|
|Muguruza charges into Wuhan last 16|
|Mkhitaryan vows to bring consistency to Manchester United|
|Lacazette ´more like Wright than Henry´ - Winterburn|
|Verratti hails ascent of PSG to Bayern´s level|
|Former Newcastle chairman Shepherd dies age 75|
|Mourinho: Lindelof will improve step by step|
|Kimmich eager to tackle Neymar challenge|
|Stokes arrest a distraction for England - Morgan|
|Emery hints at PSG penalty rotation|
|´Not many solutions´ for Man Utd after Fellaini injury, says Mourinho|
|England all-rounder Ben Stokes arrested in Bristol|
|Neymar set to return for PSG in Champions League clash against Bayern Munich|
|PSG´s home hope against Bayern as Griezmann carries Atletico - Champions League in Opta numbers|
|Defending champion Pliskova battles through in Tashkent|
|Fabregas never thought about Chelsea exit|
|Gasly replaces Kvyat as Toro Rosso prepare for 2018 F1 season|
|Starke selection not a threat to Ulreich, claims Salihamidzic|
|Wallabies lock Coleman weighing up next move|
|Manchester City look unstoppable under Guardiola - Walker|
|Hitzfeld urges Bayern to stick with Ancelotti|
|Australia call up Tye for India T20 series|
|Las Palmas coach Manolo Marquez resigns after six LaLiga matches|
|Whiteley boost for Springboks|
|Fabregas: No pure striker better than Costa|
|Ancelotti will be measured on Champions League results, Ballack claims|
|Cowboys coach Green dismissed tiredness talk as ´a load of c**p´|
|Wenger bemoans ´cruel´ Arsenal schedule|
|Tianjin derby under investigation for possible match-fixing|
|Sharks dismiss Hayne speculation|
|Cubs clinch tie for NL Central title, deal blow to Cardinals´ play-off hopes|
|He said what?! The best NFL quotes from week three|
|Prescott ignites stagnant Cowboys offense in win over Cardinals|
|WATCH: Cubs´ Russell brings Cardinals fan fresh nachos after spilling into stands|
|Alonso announces move into management|