Brad Marchand scored less than a minute into overtime to even the first-round series between the Boston Bruins and Washington Capitals 1-1 on Monday night but he also extended a pretty impressive playoff record at the same time.

The Bruins beat the Caps 4-3 but the narrow victory isn’t anything either team hasn’t seen before. 

NIC DOWD SCORES IN OT, CAPITALS  BEAT BRUINS 3-2 IN GAME 1

According to the NHL, each of the last 11 playoff contests between Boston and Washington have been decided by a one-goal margin, extending the longest such run by a set of franchises in league history.

In addition, four of the last five head-to-head playoff games between the clubs have required overtime.

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The trend dates back to the 2012 Eastern Conference Quarterfinals when the Capitals beat the Bruins in seven games, each beginning within the one-goal margin. 

The series will return to TD Garden Wednesday night where Capitals defenseman Zdeno Chara will play as a visitor in the playoffs in Boston for the first time after 73 games there as Bruins captain. 

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The Associated Press contributed to this report.