The giddiness of unforeseen perfection will continue in Queens for at least another day.

The Mets, who began subverting expectations with their season-opening sweep of the Atlanta Braves, stretched their undefeated streak to four games Monday night in bewitching fashion. After the Mets fought back from a three-run deficit, Daniel Murphy broke the tie with a run-scoring single in the bottom of the ninth to give them a 4-3 win over the Washington Nationals at Citi Field.

The Mets’ flawless four-game start is their best opening run since 2007 and has affirmed for now what the team has been saying for months: we can play.

“We know it’s a long year, and we know it’s four games,” Manager Terry Collins said. “But I think we want to show our fans, what we say, maybe there’s some truth to it, and that is we’re a better team than people give us credit for.”

With the score tied at three in the ninth, tense murmurs among the crowd of 23,970 began slowly turning into thrilled cheers.