Arsenal manager Arsene Wenger welcomed a boost to his team's faltering bid to snatch Champions League qualification after they beat struggling West Ham 3-0.
Mesut Ozil, captain Theo Walcott and Olivier Giroud netted on a morale-boosting night for the Gunners, who overtook Manchester United and climbed to fifth in the Premier League.
"It's possible, of course," said Wenger, whose side are four points behind Manchester City.
"We have a game in hand on City, we have players back from injury. We have done it before in more difficult conditions.
"It was a convincing win with good individual performances from everybody, from the goalkeeper to the strikers. It was a relief as well because we have gone through a bad period.The mentality is healthy."
West Ham have now lost five games in a row and manager Slaven Bilic urged his team to respond on Saturday against survival rivals Swansea.
"We are playing against a team who is playing good but are five points behind us," he said. "There is a reason for that also and we have to give everything and get the confidence back with a win."
Liverpool's top-four challenge wilted as they drew 2-2 at home to Bournemouth.
The Reds recovered from Benik Afobe's early goal to lead through Philippe Coutinho and Divock Origi but Josh King grabbed an 87th-minute equaliser.
On a bad day for Liverpool, it came hours after the club received a two-year ban on signing academy players for breaking rules regarding approaches for young players.
Saints clip Eagles' wings
Crystal Palace's survival hopes suffered a blow as Southampton came from behind to end the Eagles' four-match winning run 3-1.
Striker Christian Benteke put the visitors ahead but goals from Nathan Redmond, Maya Yoshida and James Ward-Prowse earned the Saints a first home win since January and left Palace 16th.
Hull escape relegation zone
Hull saw off a Middlesbrough revival to win their bottom-of-the-table clash 4-2.
Alvaro Negredo have Boro an early lead but Hull hit back through Lazar Markovic, Oumar Niasse, Abel Hernandez and Harry Maguire to climb out of the bottom three.