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.
|Syndergaard exits Mets start with apparent arm pain|
|Tye out for rest of IPL season|
|Warner fireworks see Sunrisers to victory over KKR|
|Van Wolfswinkel fires Vitesse to first major trophy|
|Finishing above Spurs never Wenger´s target|
|Pochettino delighted to award fans with ´emotional´ derby win|
|Let´s see what Chelsea have got - Spurs plan to pile on the pressure|
|Ronaldo´s perfect work ethic at Real Madrid sets him apart - Simao|
|Two red cards as merger-threatened rivals meet in Top 14|
|Porte backs up home glory with Romandie win|
|Pouille powers to second career title|
|Life on the road is sweet for record-breaking Man City|
|Koeman marvels at Gueye for controlling Hazard|
|Tottenham 2 Arsenal 0: Alli, Kane deliver in White Hart Lane´s derby farewell|
|Bills fire GM Doug Whaley, entire scouting staff|
|Home games will show whether we deserve top four – Guardiola|
|Kane breaks Tottenham record in north London derby|
|Salford climb to third with Widnes victory|
|Montella: AC Milan on track despite draw at Crotone|
|Svitolina blitzes Mertens to claim Istanbul Cup title|
|Overheating problem wrecked Hamilton´s race ´from the get-go´|
|It´s easy to lose your head - Conte salutes Chelsea attitude|
|Bath secure Champions Cup berth|
|City penalty was wrongly awarded - Agnew|
|Decima number two for Nadal in Barcelona|
|Siegemund sinks Mladenovic in Stuttgart thriller|
|´Ugly´ Roma paid the price, admits Spalletti|
|Alonso´s ´dreams´ wrecked by McLaren reliability woes|
|This was like a cup final – Cahill understands magnitude of Everton win|
|Jones and Smalling unlikely to face Celta, Mourinho claims|
|It´s his day - Vettel congratulates Bottas despite Massa frustration|
|Everton 0 Chelsea 3: Pedro stunner sets the tone as Conte´s men pass final major test|
|Middlesbrough 2 Manchester City 2: Jesus salvages late point in top-four hunt|
|Bottas thanks Mercedes for ´strange opportunity´ after Sochi triumph|
|Crotone 1 AC Milan 1: Rossoneri stumble again in further blow to European hopes|
|Injury sidelines Juve´s Rugani|
|Rashford clearly deceived referee, says Swansea boss Clement|
|Mourinho has ´zero criticism´ of ´exhausted´ United but again questions defensive trio|
|Bottas holds off late Vettel surge to claim first F1 win|
|Daredevils set unwanted IPL record in thrashing by Kings XI|
|Manchester United set unbeaten record with unwanted 36-year highest draw tally|
|Manchester United 1 Swansea City 1: Sigurdsson deals damaging blow to Mourinho´s top-four ambitions|
|Roma 1 Lazio 3: Keita double wins Derby della Capitale|
|South Africa great Donald to work with Sri Lanka for Champions Trophy|
|Lallana return the best news Liverpool could get - Klopp|
|Foran returns for Kiwis in ANZAC Test|
|Inter have financial muscle to sign Messi, claims Mazzola|
|Incredible Fritelli meltdown opens door for Levy in China|
|Mata returns to Man Utd squad, McTominay in line for debut|
|Gimenez set to miss Champions League semi-final|
|Klitschko ´one punch´ from knocking Joshua out|
|Melbourne Victory 1 Brisbane Roar 0: Berisha breaks resistance to book Grand Final spot|
|Slater scores first try in two years as Storm smash Dragons|
|Tottenham ambitions bigger than beating Arsenal, says Kane|
|Xavi wins first trophy with Al Sadd|
|Rule change helps Poulter keep PGA Tour card|
|Sauber to switch to Honda power|
|Klitschko sees Joshua as ´vulnerable´ despite dramatic Wembley loss|
|I wasn´t obsessed with goal drought, says Barcelona star Suarez|
|I can knockout anyone - Joshua revels in stunning Klitschko triumph|
|Alba frustrated but commits future to Barcelona|
|Pique: I have the most fun at Espanyol and Real Madrid|
|Gomez makes MLB history with cycle|
|Stanley Cup playoffs three stars: Capitals facing 2-0 hole to champions Penguins|
|MLS Review: Kaka scores on return for Orlando, Sounders complete three-goal comeback|
|Gimenez doubtful for Madrid clash due to adductor injury|
|Wenger warns Tottenham they could lose stars due to wage structure|
|Devils win NHL Draft lottery, Flyers picking second|
|Klitschko wants rematch after Joshua loss|
|Joshua warns he will only get better as he eyes Fury after Wembley classic|