The Premier League title race has plenty of life left thanks to Arsenal's display of character and resiliency.
After David De Gea's most recent error in another away loss for Manchester United, the battle to finish in the Champions League qualification spots is also far from over.
By handing Newcastle a rare home loss, Arsenal atoned for one of its most traumatic defeats under Mikel Arteta and kept strong pressure on Manchester City just as it appeared the defending champions might be coasting to the title.
With three months remaining in the season, City holds a one-point lead after Arsenal defeated them 2-0 in a tense St. James' Park.
With three away games in its final four games, City has a game in hand but faces a more difficult schedule.
"Let's keep going and digging and digging, and see what is there," said Arteta following a victory secured by long-range goals from Martin Odegaard in the 14th and Fabian Schar in the 71st minutes.
Arsenal's players were pushed and roughed up during a physical match, and they also enraged the home crowd with shrewd moves that may have exceeded the bounds of sportsmanship.
“We had to be very smart and to be ugly at times,” Odegaard said. “It's a big step for a young team like ours to come here and do the things we did.”