Behind the pitching of seniors Tom Hurley (1-2) and Sean Johnston, Tufts was thwarted in its come-back attempts.
Hurley started the game by retiring eight of the first nine batters he faced. Although Hurley ran into trouble in the fourth, he got the win.
Johnston relieved him in the sixth and allowed only one run and struck out six, including the side in the ninth.
"I felt pretty good and I felt loose out there," Johnston said.
Harvard puts its winning streak on the line today as it travels to Worcester to face Holy Cross. Freshman Jeff Mitchell will make his second start of the year.
HARVARD, 10-5 at Soldiers Field Park R H E Tufts 000 310 100 -- 5 8 HR: Tufts--Komboli, Cash; Harvard--DelGuiglio, Bagwell (2). 3B: Harvard--Zarate (2). 2B: Tufts--None; Harvard--Scanlan. E: Harvard--Mrowka; Tufts--Svagdis, Jason, Erickson, Walsh. WP: Hurley (1-2); LP: Williams (3-1)