Red Sox -- Emotional 9/11 Tribute Before Yankees Game

Famed rivals the New York Yankees and the Boston Red Sox will set aside their differences tonight before kicking off a 3-game series -- honoring the victims of 9/11 with an emotional tribute before Game 1 at Fenway.

A rep for the Red Sox tells TMZ, the home team has planned a special 9/11 remembrance ceremony that will occur before the game, including a moment of silence.

The rep says families who lost loved ones on 9/11 will be on the field for the ceremony.

The Boston Fire Department will act as color guard for the National Anthem -- performed by the Boston Fire Acapella Quartet (badass) -- and the flag will be presented by reps from the Boston PD, the Boston FD, and the Boston EMT.

Meanwhile, New York's other team (the Mets, in case you forgot) will be wearing special commemorative hats at tonight's game against the Nationals -- honoring the NYPD, FDNY, EMTs, and Port Authority Police Department.